Aiphone T3130BGM User manual

PROFESSIONAL AUDIO & SOUND
®
Integrated Amplifiers
© copyright Paso Sound Products, Inc. 2005 Specifications are subject to change without notice
Innovation through technology since 1931
Manual
OOMM116677
Installation Manual
and Operating Instructions
4 Channel - 2 Zone - VOX -MOH -
Phone Interface
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REV. 4.0
IMPORTANT NOTE: THIS OPERATING MANUAL IS PROVIDED AS AN INSTALLATION AND
AS AN OPERATING AID. PASO SOUND PRODUCTS, INC. DOES NOT ASSUME ANY
RESPONSIBILITY AS TO ITS ACCURACY AND SHALL NOT BE LIABLE IN TORT OR CON-
TRACT FOR ANY DIRECT CONSEQUENTIAL OR INCIDENTAL LOSS OR DAMAGE ARISING
FROM THE INSTALLATION, USE OR INABILITY TO USE THIS PRODUCT.
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PROFESSIONAL AUDIO & SOUND
®
DESCRIPTION AND APPLICATIONS SPECIFICATIONS
PAGE 2 © copyright Paso Sound Products, Inc. 2005 Specifications are subject to change without notice T3115/3130/3160BGM
UNPACKING
Immediately upon receipt of the amplifier, inspect the unit
and shipping container for indications of improper handling
or in transit damage. The equipment was carefully inspect-
ed and tested before leaving the factory. Notify the
Transportation Company immediately if any damage is
found. ONLY THE CONSIGNEE CAN FILE A CLAIM WITH
THE CARRIER FOR DAMAGE DURING SHIPMENT. Be
sure to save the carton and packing material as evidence of
damage for the shipper inspection. DO NOT SHIP the unit
back to the factory unless authorized by the factory.
IN TRANSIT DAMAGES ARE NOT COVERED BY THE
PASO WARRANTY.
4 Channel Inputs - 2 Zone Outputs
Wide Frequency Response
Very Low Distortion
Balanced Microphone Input
Phantom Power on MIC Input with Selector
Transformer Balanced Phone Paging Input
Telephone Input Level Control
Auxiliary Input With Stereo Summing
Auxiliary Input Attenuator
Balanced Program Input
Independent Input Controls
Bass and Treble Controls
VOX - Voice Activated Muting
Direct Muting or Unmuting
600 ohm and 8 ohm 1 Watt
Music on Hold Amplifier
MOH Amplifier Source Selector
Zone 2, 1 Watt - 8 ohm Output
with Separate Control
AC Accessory Outlet
8 ohm, 25 Volt & 70 Volt
Output Impedance
Rack Mounting with Optional Kit
UL 6500 Listed (US - CANADA)
INTEGRATED AMPLIFIERS
T3115 Power Output:
T3130 Power Output:
Distortion:
Frequency Response:
Inputs:
Input 1
Input 2
Input 3
Input 4
Sensitivity & Z:
Input 1
Input 2
Input 3
Input 4
Hum & Noise:
Telephone Input:
Music on Hold Output:
Zone 2 Output:
Output Impedance:
Controls:
Front Panel:
Rear Panel
Phantom Power:
MOH Source:
Tone Control Action:
VOX:
Muting/Unmuting:
Rack Mounting:
Power Requirement:
Power Consumption:
AC Accessory Outlet:
Terminations:
Housing Finish:
Dimensions:
Net Weight:
15 Watt RMS
30 Watt RMS
Less than 0.5% THD
20 - 20,000 Hz ± 1 db
Microphone Balanced
Telephone Transformer Balanced
Auxiliary
Program Balanced
Mic =1 Mv - 250 ohm balanced
Te l =100 Mv - 600 ohm balanced
Aux =100 Mv - 47K ohm
Prog. =1 Volt - 10K ohm balanced
Mic -70 db, Aux/Pgm -75 db
600 ohm Transformer balanced
600 ohm-1 Volt Transf. balanced
1 Watt-8 ohm
8 ohm, 25 Volt and 70 Volt line
MIC Volume, AUX Volume,
PROG Volume, Bass, Treble
PHONE Level, AUX Attenuator,
MOH & ZONE 2 Level Control
On MIC Input w/internal jumper
AUX or PROG w/internal jumper
+/-10 db at 100 Hz and 10 K hz
Voice Activated Muting
MIC/PHONE mutes AUX/PROG
Mutes or Unmutes
MIC/AUX/PROG
Optional Rack Kit
117 Volt, 50-60 Hz
T3115 = 570 VA, T3130 = 600 VA
500 W Max. Unswitched
Screw Terminals, RCA Jacks
Black
10.5"W., 9.5"D., 3.5"H.
(267X242X89 mm)
T3115 = 8 Lbs (3.7 Kg)
T3130 = 11 Lbs (5.0 Kg)
27/3500 - Standard 19” Rack Mounting Kit. Black finish.
Complete with hardware
ACCESSORIES

PAGE 3
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
RACK MOUNTING
READ BEFORE OPERATING READ BEFORE OPERATING
BEFORE OPERATING THE AMPLIFIER, BE SURE YOU
FULLY UNDERSTAND ALL INSTRUCTIONS AND FEA-
TURES OF THE UNIT.
1) Read these instructions carefully.
2) Keep these instructions.
3) Heed all Warnings.
4) Follow all instructions.
5) DO NOT use this apparatus near water.
6) Clean ONLY with a damp cloth.
7) DO NOT block any of the ventilation openings.
Install in accordance with the instructions provided.
8) DO NOT install near any heat sources such as
radiators, stoves, or other apparatus (including ampli-
fiers) that produce heat.
9) DO NOT mount amplifier into a container or a
closed unventilated closet while operating.
10) DO NOT place any object or accessory equipment
such as Tuners, Mixers, Cassette Decks, etc. on top of
the amplifier. Obstructing or closing the cabinet venti-
lation openings may cause overheating.
11) DO NOT defeat the safety purpose of the polar-
ized or grounding type plug. A polarized plug has two
blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The
wide blade and or the third prong is provided for your
safety. When the provided plug does not fit into your
outlet, consult an electrician for replacement of the
obsolete outlet.
12) Use only the attachments and accessories speci-
fied in this manual.
13) If a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-
over.
14) Unplug this apparatus during lighting storms or
when unused for long periods of time.
15) Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normal-
ly, or has been dropped.
16) DO NOT replace fuses unless power cord is
removed from the AC wall outlet.
17) DO NOT install accessories unless the power
cord is removed from the AC wall outlet.
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS APPLIANCE TO WATER, RAIN OR
MOISTURE
IMPORTANT SAFETY INSTRUCTIONS
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
A) Procure the optional accessory Rack Mount Kit.
B) Turn amplifier up side down and remove the four rubber feet by unscrewing the four holding screws.
C) Remove three screws on each side of the amplifier holding the amplifier cover.
D) Install the rack kit brackets by using the self-tapping screws provided and the screws removed as per C.
O
SERIES 3000 INTEGRATED AMPLIFIER
POWER
3115rack mount
56
7
8
2
1
010
9
3
4..
..
.
.
..
.
.
.
AUX
56
7
8
2
1
01
0
9
3
4..
..
.
.
..
.
.
.
MIC
56
7
8
2
1
010
9
3
4..
..
.
.
..
.
.
.
PROGRAM
2
1
3
44
10
-
5
5
+
3
2..
..
.
.
.
.
.
.
.
TREBLE
BASS
2
1
3
44
10
-
55
+
3
2..
..
.
.
..
.
.
.
Fig. 3 - Rack Kit Mounting

PROFESSIONAL AUDIO & SOUND
®
PAGE 4 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
FRONT PANEL CONTROLS
REAR PANEL INPUTS - OUTPUTS
O
56
7
8
2
1
010
9
3
4
.
.
..
.
.
.
.
.
.
.
56
7
8
2
1
010
9
3
4
.
.
..
.
.
.
.
.
.
.2
1
3
44
10
-5 5+
3
2.
.
..
.
.
.
.
.
.
.2
1
3
44
10
-5 5+
3
2.
.
..
.
.
.
.
.
.
.
SERIES 3000 INTEGRATED AMPLIFIER
MIC PROGRAM BASS TREBLE POWER
3115cont
2 3 4 5 6
56
7
8
2
1
010
9
3
4
.
.
..
.
.
.
.
.
.
.
1
AUX
PROFESSIONAL AUDIO & SOUND
®
3115inou
1
12
131415
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT
REMOVE COVER.THERE ARE NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION:TO REDUCE THE RISK OF FIRE,
REPLACE ONLY WITH SAMETYPE OF
FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE DE
MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE OU
DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA PLUIE OU
L©HUMIDITE, NE PAS ENLEVER LE COUVERCLE. AUCUN
REGLAGE A L©INTERIEUR. POUR REPARATION
CONSULTERUNE PERSONNE QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8OHM
1 WATT
825V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
52 3 4 6
11 10 9 8
7
1) MICROPHONE Input Volume Control
2) AUX Volume Control
3) PROGRAM Volume Control
4) Bass Control
5) Treble Control
6) On-Off Power Switch
1) Unswitched AC Auxiliary Socket
2) 600 ohm MOH Output
3) 1 Watt 8 ohm Output (2nd zone or MOH)
4) MOH Output Level
5) AUX Input
6) AUX Input Level Attenuator
7) TEL Output Level Control
8) Balanced Telephone Paging Input
9) Balanced Microphone Input
10) Balanced Program Input
11) Mute/Unmute Terminals
12) Speaker Output
13) Chassis Ground Screw
14) AC Line Fuse
15) AC Power Cord
Fig. 4 - Front Panel Controls
Fig. 4A - Rear Panel Inputs and Outputs

PAGE 5
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
INPUT CONNECTIONS
MICROPHONE INPUT
MICROPHONE TYPE
The Microphone Input accept Low Impedance (250-600 ohm)
Microphones. The Microphone may be a balanced output type
(three wire) or an unbalanced output type (two wire).
PASO MICROPHONES
All PASO low impedance Microphones have a balanced output for
best performance. Connect the RED lead to terminal HOT, the
WHITE lead to terminal COM and the SHIELD to terminal G (see
Fig. 5A).
CAUTION
TO PREVENT POSSIBLE DAMAGE TO SPEAKERS OR THE
AMPLIFIER ALL INPUT CONNECTIONS MUST BE MADE WITH
THE AMPLIFIER OFF (POWER OFF).
WIRING
CABLE
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT
REMOVE COVER. THERE ARE NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION:TO REDUCE THE RISK OF FIRE,
REPLACE ONLY WITH SAMETYPE OF
FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE DE
MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE OU
DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA PLUIE OU
L©HUMIDITE, NE PAS ENLEVER LE COUVERCLE. AUCUN
REGLAGE A L©INTERIEUR. POUR REPARATION
CONSULTERUNE PERSONNE QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
Fig. 5 Amplifier Rear Panel View
3115micbal
The microphone lead color refers to Paso Microphones only. When using
other microphone brand refer to instructions packed with the unit.
GUNMUTE
PROGRAM
COM HOT
SHIELD
MIC
RED
BALANCED
MIC
THREE LEADS BALANCED MICROPHONE WIRING
G COM HOT
BALANCED
G MUTE
WHITE
3115micunbal
The microphone lead color refers to Paso Microphones only. When
using other microphone brand refer to instructions packed with the unit.
SHIELD
MIC
RED
TWO LEADS UNBALANCED MICROPHONE WIRING
WHITE
GUNMUTE
PROGRAM
COM HOT
BALANCED
MIC
G COM HOT
BALANCED
G MUTE
Fig. 5A - Rear Panel MIC Input Terminals
MICROPHONE INPUT
Attach the microphone leads to the terminal strip as per diagram
in Fig 5A or Fig. 5B.
DO NOT GROUND THE MICROPHONE CABLE SHIELD TO THE
CHASSIS OF THE AMPLIFIER
Fig. 5B - Rear Panel MIC Input Terminals
BALANCED MICROPHONE
IMPORTANT NOTE: The use of an unbalanced Microphone (two
leads) is not recommended. For best results in a PA Application
always use a Unidirectional, Low Impedance, Balanced
Microphone (three leads).
CABLE LENGTH - If the distance between the Microphone and
the Amplifier Input is greater than 15 ft (4.5 m) a Balanced
Microphone must be used. Use a two conductor shielded wire and
connect Microphone to Amplifier as per Diagram in Fig. 5A.
MICROPHONE CABLE ROUTING - The Microphone Cable
should be carefully routed. Improper Cable routing will cause spu-
rious oscillations, regenerative noises, hum, etc. that may perma-
nently damage the Amplifier.
Do not route cable next to power lines.
Do not route cable near or over Fluorescent Fixtures.
Do not route cable next to Speaker Wires.
Do not install cable inside Power Line Conduits.
Avoid the use of staples that may penetrate the cable.
UNBALANCED MICROPHONE
Attach the Microphone leads to the terminal strip as per diagram
in Fig 5B.
Be sure the cable length does not exceeds 15 Ft. (4.5 m).

PROFESSIONAL AUDIO & SOUND
®
PAGE 6 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
INPUT CONNECTIONS
MICROPHONE INPUT
USING A PUSH-TO-TALK DESK BASE MICROPHONE
Microphone paging and precedence over the AUX or PROGRAM
channels may be accomplished by using a Desk Base or a
Gooseneck Microphone. Wire the Microphone output leads to the
MIC input terminals as per Fig. 6A.
MUTING: The Amplifier is equipped with two independent Muting
Circuits:
Direct Muting by shorting the MUTE Terminals
Automatic Muting with VOX - Voice Activated Muting
For additional information on the Muting operation refer to the
Muting Functions section of this Manual.
WIRING
CONNECTING TO THE TELEPHONE PAGING SYSTEM
DESK BASE/GOOSENECK MICROPHONE WITH MUTING SWITCH
micbas03
GGG COM HOTHOT HOTCOM COMG MUTEUNMUTE
PROGRAM MIC TEL
SHIELD
MIC
MUTING SWITCH
AB
MIC
MICROPHONE OUTPUT LEVEL CONTROL IS LOCATED ON THE FRONT PANEL
TELEPHONE PAGING INPUT
teleinp03
RT
TEL
TIP
RING
Telephone
System KSU
BALANCEDBALANCEDBALANCED
GGG COM HOTHOT HOTCOM COMG MUTEUNMUTE
PROGRAM MIC TEL
TEL OUTPUT
LEVEL
TELEPHONE PAGING LEVEL CONTROL
Fig. 6A - Rear Panel MIC Input Terminals
Wire the Desk Base Microphone leads to the Microphone Input
terminal strip as per diagram in Fig 6A. Check Microphone instruc-
tions and connect HOT LEAD (B) to Terminal HOT, COMMON
LEAD (A) to Terminal COM and SHIELD LEAD to Terminal G.
DO NOT GROUND THE MICROPHONE CABLE SHIELD TO THE
CHASSIS OF THE AMPLIFIER
Fig. 6B - Rear Panel TEL Input Terminals
PAGING FROM THE TELEPHONE SYSTEM
WIRING - The Amplifier is interface ready for the Telephone line in
applications requiring paging from the telephone system. The
Telephone line Paging Output (Tip and Ring) can be directly con-
nected to the TEL input and to the HOT and COM as shown in the
wiring diagram Fig. 6B.
CABLE - Use a two conductor twisted wire.
DO NOT GROUND THE TIP OR RING WIRE TO THE CHASSIS
OF THE AMPLIFIER
OUTPUT LEVEL CONTROL - An Output Level Control is provided
on the rear panel. After wiring adjust control for the desired output
level.
VOICE ACTIVATED MUTING (VOX) - Muting of the AUX or PRO-
GRAM channels (music muting) during Paging is automatic via the
Voice Activated Muting System. No contact closure for the Muting
Circuit is required from the Telephone system. For additional infor-
mation on the Muting operation refer to the Muting Functions sec-
tion of this Manual.
b50side
b50side
Push to Talk Key
Push to Talk Key
KSU
Key Service Unit
telpagin
Telephone
DMS Amplifier
DIGITALMUSIC AMPLIFIER
O
POWER
PROFESSIONALAUDIO &SOUND
DIGITALMUSIC SERIES
TM
OUTPUT LEVEL
PEAK
INPUT 1 INPUT2 INPUT 3 INPUT 4/AUX 1 INPUT 5/AUX 2 BASS TREBLEMODULE
100100 100 100 100 100 +10-10 +10-10
DMS
TEL
Fig. 6C - Desk Base Microphone

PAGE 7
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
INPUT CONNECTIONS
MICROPHONE INPUT PHANTOM POWER
CONDENSER AND ELECTRET TYPE MICROPHONES
Condenser and Electret Microphones require a DC Operating
Voltage. Paso Amplifiers provide this operating voltage or Phantom
Power selectively on the Microphone Input.
Prior to selecting the Condenser or Electret Microphone be sure
that the Operating Voltage and Output Impedance of the device
match the Input characteristics of the Amplifier listed below.
Phantom Power = 16 Volt DC
Input Impedance = 250 to 600 ohm
ACCESS TO PHANTOM POWER SELECTOR
1) Remove Power Cord from AC Outlet.
2) Remove the three screws on each side of the Amplifier and
the three screws located on the Rear Panel Top securing the
Top Cover to the Chassis.
3) Lift Cover and carefully slide Cover out towards the rear.
4) Locate the Preamplifier Printed Board No. 3130-2 attached
to the rear panel and behind the Inputs Terminal Strip.
PHANTOM POWER SELECTOR
3115micbal05
The diagram indicates the Phantom Power Voltage and Polarity available at
the Input Terminals when the Phantom Power is activated
GUNMUTE
PROGRAM
COM HOT
+16V
BALANCED
MIC
BALANCED CONDENSER/ELECTRET MICROPHONE WIRING
G COM HOT
BALANCED
G MUTE
+16V
SHIELD
MICROPHONE
CONDENSER
ELECTRET
0
Fig. 7 - Rear Panel MIC Input Terminals
Fig. 7A - Preamplifier PCB Top View
PHANTOM POWER SELECTOR JUMPER
By following the Preamplifier Printed Board layout as
shown on Fig. 7A locate the Selector Jumper marked
PHANTOM.
The Jumper Socket is marked as follows:
JP4 = ON - OFF - PHANTOM
To turn the Phantom Power On, re-position the
Jumper to the ON POSITION (JP 4).
To change the Selector position lift the Mini Shorting
Plug out of the socket pins and re-position as desired.
Make sure the Mini Plug is lined up with the socket
pins.
THE FOLLOWING INSTRUCTIONS REQUIRE THE REMOVAL OF THE AMPLIFIER PROTECTIVE COVER AND ARE
PROVIDED FOR USE BY QUALIFIED PERSONNEL ONLY.
TO AVOID THE RISK OF ELECTRICAL SHOCK DO NOT PERFORM ANY INSTALLATION OR SERVICING UNLESS YOU
ARE QUALIFIED TO DO SO. REFER INSTALLATION OR SERVICING TO QUALIFIED PERSONNEL.
CAUTION ! REMOVAL OF THE AMPLIFIER COVER PRESENTS AN ELECTRICAL SHOCK HAZARD
ALWAYS REMOVE THE POWER CORD FROM THE AC WALL OUTLET
AMPLIFIER REAR PANEL
CONDENSER AND ELECTRET MICROPHONES WIRING
CONDENSER/ELECTRET MICROPHONE
Carefully follow the wiring instruction packed with the Microphone
used. Attach the microphone leads to the terminal strip as per dia-
gram in Fig 7.
DO NOT GROUND THE MICROPHONE CABLE SHIELD TO THE
CHASSIS OF THE AMPLIFIER

PROFESSIONAL AUDIO & SOUND
®
PAGE 8 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
MUTING FUNCTIONS
VOX - VOICE ACTIVATED MUTING - The Amplifier is equipped
with a noiseless, fast acting Logic Muting Function. When a signal
is present at the MICROPHONE or TELEPHONE Input, either
from a Microphone or a Telephone Paging source, the Muting
Function is activated muting the source present at the AUX Input
and as well as the source present at the PROGRAM input if selec-
tively activated. Once the Signal (paging) is terminated the pro-
gram is automatically restored on all muted inputs.
FOR THE VOX ATTACK AND DECAY TIMING REFER TO THE
FIG. 9B DIAGRAM.
ACCESS TO MUTING SELECTORS
FOLLOW DIRECTIONS AS PER DIRECT MUTING FUNCTION.
Fig.8 - Main Amplifier PCB - VOX - MUTING Section - Top View
VOX - VOICE ACTIVATED MUTING
VOX SENSITIVITY CONTROL
3130 - 1
SELECTOR JUMPERS
ON OFF
JP3
ON OFF
JP1
ON OFF
JP2
MIC
VOLUME
AUX
VOLUME
PROGRAM
VOLUME
VOX
VOX SENSITIVITY TRIMMER
VR9
VOX
The VOX Sensitivity Intervention threshold is adjusted at the factory for best performance and does not require re-touch-
ing under normal circumstances. Should the Trimmer pre-setting require adjustment follow the instructions listed below.
The Amplifier provides several levels of Muting functions:
MICROPHONE Can be selectively Muted by internal selector
TELEPHONE This input is never Muted
AUXILIARY Can be selectively Muted by internal selector
PROGRAM Can be selectively Muted by internal selector
MUTING FUNCTIONS
CAUTION: PRIOR TO PERFORMING THIS
OPERATION BE SURE TO FOLLOW THE
SAFETY NOTES REFERRING TO THE
REMOVAL OF THE AMPLIFIER COVER.
AUTOMATIC PRECEDENCE THRESHOLD
The VOX Trimmer VR 9 sets the sensitivity level at which
point the VOX is engaged during paging. The VOX
Trimmer VR9 is located on the Main Printed Circuit
Board (see Fig.89).
CAUTION: Procure a miniature screwdriver having a tip
NO WIDER than 3/16” (3 mm). A larger tip screwdriver
can damage the trimmer.
1) Turn all Input Controls to 0.
2) Turn Trimmer counterclockwise until it stops.
3) Connect a Paging Source (Microphone or Telephone)
to the respective Input Terminals (For connection details
refer to the appropriate section in this Manual).
4) While talking from the Paging Source (Microphone or
Telephone) rotate the MIC (Front Panel) or TEL (Rear
panel) Volume Control until the desired output level is
achieved.
5) Connect a Music Source to the AUX 1 Input and
rotate the AUX 1/CD Volume Control on the front panel
until the desired output level is achieved.
6) While talking from the Paging Source (Microphone or
Telephone) turn the Trimmer slowly clockwise until the
Program (music) is cut-off (Muting activated).
VOX SENSITIVITY ADJUSTMENT
VOX DEFEAT INSTRUCTIONS
In applications requiring the VOX to be
inoperative rotate the VOX TRIMMER VR 9
fully counterclockwise. In this position the
VOX is inoperative.
MUTING JUMPERS ADDRESS
Several Jumpers are provided to set the Muting functions:
JUMPER NO. FUNCTION
JP 1 MICROPHONE Mute ON - OFF
JP 2 AUXILIARY Mute ON - OFF
JP 3 PROGRAM Mute ON - OFF
NOTE: The Microphone Input is provided with a unique MUTE
and UNMUTE function. See the Mute/Unmute operation instruc-
tions in the appropriate section in this Manual.

PAGE 9
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
MUTING FUNCTIONS
DIRECT MUTING - Program (Music) Muting may be accomplished
by shorting the MUTE and the GTerminals through an external
switch (see Diagram in Fig. 9). Each time the Muting Switch is
closed the source from the AUX INPUT and the PROGRAM
INPUT may be selectively muted in accordance to the MUTING
JUMPERS setting (See Muting Jumpers Address).
THE MUTING (VOX) JUMPERS ARE PRESET AT THE FACTORY
AS PER TABLE AND DIAGRAM BELOW:
JUMPER NO. FUNCTION POSITION SET
JP 1 MICROPHONE Mute OFF
JP 2 AUXILIARY Mute ON
JP 3 PROGRAM Mute ON
If the Jumpers preset requires resetting follow the instruction
below.
ACCESS TO MUTING JUMPERS
1) Remove Power Cord from AC Outlet.
2) Remove the four screws on each side of the Amplifier secur-
ing the Top Cover to the Chassis.
3) Lift Cover and carefully and slide Cover out towards the rear.
4) Locate the Main Amplifier Printed Board No.3130-1 attached
to the front panel and behind the Controls.
5) Set Jumpers as required.
MUTING/UNMUTING
Fig. 9 - Direct Muting Terminals and Diagram
MICROPHONE INPUT UNMUTING FUNCTION
The Microphone Input can be preset to be normally MUTED
(INPUT OFF) - (JUMPER JP1 - ON) and turned ON when the
UNMUTE and GTerminals are shorted by a Switch Contact. This
function allows for a multi zone installation using two or more
Amplifiers and a single Microphone and Zone Switches. When the
Jumper JP1 is set to the ON Position the Microphone Input is OFF
and it is turned ON when the UNMUTE and the G terminals are
closed by a switch.
A 3 Zone Paging Wiring Diagram illustrating this Application is pro-
vided in this Manual.
THE FOLLOWING INSTRUCTIONS REQUIRE THE REMOVAL OF THE AMPLIFIER PROTECTIVE COVER AND ARE
PROVIDED FOR USE BY QUALIFIED PERSONNEL ONLY.
TO AVOID THE RISK OF ELECTRICAL SHOCK DO NOT PERFORM ANY INSTALLATION OR SERVICING UNLESS YOU
ARE QUALIFIED TO DO SO. REFER INSTALLATION OR SERVICING TO QUALIFIED PERSONNEL.
CAUTION ! REMOVAL OF THE AMPLIFIER COVER PRESENTS AN ELECTRICAL SHOCK HAZARD
ALWAYS REMOVE THE POWER CORD FROM THE AC WALL OUTLET
DIRECT MUTING
WIRING
MICROPHONE WITH DIRECT MUTING SWITCH
3115mutswit03
GGG COM HOTHOT HOTCOM COMG MUTEUNMUTE
PROGRAM MIC TEL
SHIELD
MIC
MUTING SWITCH
Signal
Level
Mute
terminals
shorted
Program
gradually
restored
2-3
sec.
Program
Attenuation
50 db Mute terminals
opened
time
mutfunct
Fig. 9B - Muting Function Timing Diagram
MUTING TIMING - The Program Attenuation is preadjusted for -50 db.
When the Muting is activated the Program Source is instantaneously
turned-off. When the Muting is turned off the program (music) is gradually
restored (2-3 seconds).
ON OFF
JP3
ON OFF
JP1
ON OFF
JP2
VOX
VR9
VOX
JP1= OFF - JP2= ON - JP3= ON
Fig. 9C - Muting Jumpers Pre-Set

PROFESSIONAL AUDIO & SOUND
®
PAGE 10 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
MICROPHONE INPUT UNMUTING FUNCTION
The Microphone Input can be preset to be normally MUTED
(INPUT OFF) - (JUMPER JP1 - ON) and turned ON when the
UNMUTE and GTerminals are shorted by a Switch Contact. This
function allows for a multi zone installation using two or more
Amplifiers and a single Microphone and Zone Switches. When the
Jumper JP1 is set to the ON Position the Microphone Input is OFF
and it is turned ON when the UNMUTE and the G terminals are
closed by a switch.
JUMPER NO. FUNCTION POSITION SET
JP 1 MICROPHONE Mute ON
If the Jumper preset requires resetting follow the instruction below.
ACCESS TO MUTING JUMPERS
1) Remove Power Cord from AC Outlet.
2) Remove the four screws on each side of the Amplifier secur-
ing the Top Cover to the Chassis.
3) Lift Cover and carefully slide Cover out towards the rear.
4) Locate the Main Amplifier Printed Board No.3130-1 attached
to the front panel and behind the Controls.
5) Set Jumpers as required.
Fig. 10 - Direct Unmuting Terminals and Diagram
THE FOLLOWING INSTRUCTIONS REQUIRE THE REMOVAL OF THE AMPLIFIER PROTECTIVE COVER AND ARE
PROVIDED FOR USE BY QUALIFIED PERSONNEL ONLY.
TO AVOID THE RISK OF ELECTRICAL SHOCK DO NOT PERFORM ANY INSTALLATION OR SERVICING UNLESS YOU
ARE QUALIFIED TO DO SO. REFER INSTALLATION OR SERVICING TO QUALIFIED PERSONNEL.
CAUTION ! REMOVAL OF THE AMPLIFIER COVER PRESENTS AN ELECTRICAL SHOCK HAZARD
ALWAYS REMOVE THE POWER CORD FROM THE AC WALL OUTLET
DIRECT MUTING/UNMUTING
WIRING
MICROPHONE WITH DIRECT UNMUTING SWITCH
3115unmutswit00
GGG COM HOTHOT HOTCOM COMG MUTEUNMUTE
PROGRAM MIC TEL
SHIELD
MIC
UNMUTING SWITCH
ON OFF
JP3
ON OFF
JP1
ON OFF
JP2
VOX
VR9
VOX
MIC MUTE JUMPER JP1= ON
Fig. 10B - MIC Input Muting Jumper Setting
2 31
ZONE 1
ZONE PAGING SELECTORS
ZONE 2 ZONE3
PAGING MICROPHONE
TO AMP 1
TO AMP 2
TO AMP 3
3 Zone Panel
TO MIC INPUT
A typical 3 Zone Switching Panel is shown below. Use
SPDT Momentary Contact Switches. See complete 3 Zone
Wiring Diagram provided in this Manual.
Fig. 10C - 3 Zone Switching Panel
MIC INPUT UNMUTING FUNCTION

PAGE 11
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
Fig. 11 - 3 Zone Paging and Music System
OPERATION - A 3 Zone Paging Wiring Diagram Application is provided.The Paging Microphone is connected in parallel to all the
Microphone Inputs. Three Independent SPDT Switches are provided for the Paging Zone Selection. MUSIC - The MUSIC SOURCE
(Satellite receiver) is cascade connected to all three Amplifiers. ZONE PAGING - When one or more Zone Switches are activated the
UNMUTE Function OPENS the Microphone Channel on the Amplifier selected and the MICROPHONE is active for the PAGING.
Simultaneously the MUSIC is MUTED ONLY ON THE ZONE (OR ZONES) SELECTED. Independent MUSIC SOURCE may be provid-
ed to each of the Amplifiers if required. MOH - MUSIC ON HOLD is available from each of the Amplifiers used. The MOH source maybe
selected from either the AUX or PROGRAM Input and is immune to Paging or the MUTE/UNMUTE Function.
WIRING DIAGRAM
25V/70V Speaker 25V/70V Speaker 25V/70V Speaker
25V/70V Speaker 25V/70V Speaker 25V/70V Speaker
25V/70V Speaker 25V/70V Speaker 25V/70V Speaker
2 31
HOT
COMMON
GROUND (SHIELD)
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO
NOT REMOVE COVER.THERE ARE NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
CAUTION:TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH
SAMETYPE OF FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE
DE MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE
OU DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA
PLUIE OU L©HUMIDITE, NE PAS ENLEVER LE
COUVERCLE. AUCUN REGLAGE A L©INTERIEUR.
POUR REPARATION CONSULTERUNE PERSONNE
QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO
NOT REMOVE COVER.THERE ARE NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
CAUTION:TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH
SAMETYPE OF FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE
DE MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE
OU DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA
PLUIE OU L©HUMIDITE, NE PAS ENLEVER LE
COUVERCLE. AUCUN REGLAGE A L©INTERIEUR.
POUR REPARATION CONSULTERUNE PERSONNE
QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO
NOT REMOVE COVER.THERE ARE NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
CAUTION:TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH
SAMETYPE OF FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE
DE MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE
OU DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA
PLUIE OU L©HUMIDITE, NE PAS ENLEVER LE
COUVERCLE. AUCUN REGLAGE A L©INTERIEUR.
POUR REPARATION CONSULTERUNE PERSONNE
QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
MUSIC OUTPUT
SATELLITE RECEIVER
ZONE 1
ZONE PAGING SELECTORS
ZONE 2
MUSIC SOURCE LINE
MUSIC SOURCE LINE
ZONE3
PAGING MICROPHONE
ZONE 1
ZONE 2
ZONE 3
ON OFF
JP3
ON OFF
JP1
ON OFF
JP2
VOX
VR9
VOX
JP1= ON - JP2= ON - JP3= ON
3115 V o x J umpers
MUTING SELECTOR JUMPERS SETTING ON
ALL THREE ZONE AMPLIFIERS
MICROPHONE WIRE
2 Conductor Shielded
Paging Microphone should be
Unswitched and always ON

PROFESSIONAL AUDIO & SOUND
®
PAGE 12 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
INPUT CONNECTIONS
AUXILIARY INPUT
The AUX input is provided for high level program source. The out-
put from a Satellite Receiver Tuner, Tape Cassette Deck, CD
Player or other high level program source may be directly connect-
ed to this input.
AUX INPUT SENSITIVITY ATTENUATOR
The AUX Input is equipped with a Sensitivity Attenuator that
allows the interface of the AUX Input with Devices having a wide
range of Output Levels.
TYPICAL OUTPUT LEVEL OF MUSIC DEVICES:
Satellite Receivers = 1 to 5 Volt
Digital Tuners/Receivers = 100 to 300 Mv
CD Players/Changers = 2 to 3 Volt
Tape Decks = 500 to 700 Mv
By adjusting the Input Sensitivity to the level that matches the
device used the correct interface with the Amplifier is achieved
resulting in lower overall distortion and better frequency response
characteristics.
SETTING THE AUX INPUT ATTENUATOR
Connect a Music Source to the Amplifier.
Turn Attenuator (rear panel) fully counterclockwise.
Tu r n AUX Front Panel Control to about 2 o’ clock.
Switch Amplifier and Music Source ON.
Turn rear panel Attenuator Control clockwise slowly until desired
Output Level is achieved.
Adjust AUX Front Panel Level Control Up-Down as desired.
STEREO SUMMING
Since most Music Source Devices provide a Stereo Output the
Amplifier is equipped with two Jacks for the AUX Input (L and R).
The two Inputs are internally buffered and electronically mixed to
Mono. This system ensures that the Music Device is properly
loaded and that the Stereo Signals are correctly summed (L+R) to
Mono without distortion.
CABLE
To connect the music source devices to the AUX Input use two sin-
gle conductor shielded audio cable terminated in a single prong
phono plug on both ends.
CAUTION: TO PREVENT POSSIBLE DAMAGE TO SPEAKERS OR THE AMPLI-
FIER ALL INPUT CONNECTIONS MUST BE MADE WITH THE AMPLIFIER OFF.
3115 Aux
MUTE
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
8 OHM
1 WATT
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
SATELLITE RECEIVER
paso
TRACK 01
CD
MUSIC OUTPUT
AM/FM TUNER
CD PLAYER
TAPE DECK
LLRR
Fig. 12 - Rear Panel AUX Input Diagram
AUX INPUT
AUXILIARY INPUT MUTING
3115 Aux Att
MUTE
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
8OHM
1 WATT
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
Screwdriver Adjust
3115 St Sum
MUTE
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
8 OHM
1 WATT
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
MUSIC OUTPUT
LR
Fig. 12B - Rear Panel AUX Input Sensitivity Attenuator
Fig. 12C - Rear Panel AUX Stereo Summing Inputs
MUTING
The AUX Input can be Muted or not when the VOX is acti-
vated by Paging from the MIC Input or the Phone Input.
The same occurs when the Direct Muting is applied. For
location and Setting of Muting Jumpers see the proper sec-
tion in this manual.
ON OFF
JP3
ON OFF
JP1
ON OFF
JP2
VOX
VR9
VOX
AUX MUTE JUMPER JP2= ON
3115 AUX Jumper 00
Diagram shows
AUX Muting ON.
AUX Muting can
be turned OFF
by moving JP2
Jumper to the
OFF Position
Fig. 12D - AUX Input Muting Jumper JP 2

PAGE 13
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
INPUT CONNECTIONS
PROGRAM INPUT
The PROGRAM Input is a balanced high level input (1 Volt
Sensitivity) provided specifically for direct connection to a
Satellite Receiver with a balanced Output or other high
level Balanced Program Source. An independent Output
Level Control is provided on the front panel of the Amplifier.
CABLE
To connect the Satellite Receiver to the PROGRAM Input
use a dual conductor shielded audio cable with stripped
wires on both ends. Connect the audio leads to HOT and
COM and the shield to G.
CAUTION: TO PREVENT POSSIBLE DAMAGE TO SPEAKERS OR THE AMPLI-
FIER ALL INPUT CONNECTIONS MUST BE MADE WITH THE AMPLIFIER OFF.
3115 Program
MUTE
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
8 OHM
1 WATT
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOM
GHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
MUSIC OUTPUT
Balanced
SATELLITE RECEIVER
SHIELD
SHIELD
Fig. 13 - Rear Panel PROGRAM Input Diagram
PROGRAM INPUT
PROGRAM INPUT MUTING
3115 Network
MUTE
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
8 OHM
1 WATT
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOM
GHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
MUSIC OUTPUT
Balanced
SATELLITE RECEIVER
SHIELD
SHIELD
AMPLIFIER 2
MUTE
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
8 OHM
1 WATT
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOM
GHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
SHIELD
AMPLIFIER 1
TO NEXT AMPLIFIER
Fig. 13B - PROGRAM Input Networking Diagram
MUTING
The PROGRAM Input can be Muted or not when the VOX
is activated by Paging from the MIC Input or the Phone
Input. The same occurs when the Direct Muting is applied.
For location and Setting of Muting Jumpers see the proper
section in this manual.
ON OFF
JP3
ON OFF
JP1
ON OFF
JP2
VOX
VR9
VOX
PROGRAM MUTE JUMPER JP3= ON
3115 PROG Jumper 00
Diagram shows
the PROGRAM
Muting ON.
PROGRAM
Muting can
be turned OFF
by moving JP3
Jumper to the
OFF Position
Fig. 13C - PROGRAM Input Muting Jumper JP 3
NETWORKING
NETWORK APPLICATION
In applications requiring the use of multiple Amplifiers with
a single Satellite Receiver, the Balanced Program Input of
the Amplifier may be used. The Amplifiers are cascaded as
shown in Diagram 13B and then connected to the Satellite
Receiver Balanced Output.
The Music Output Level may be adjusted by using the
PROGRAM Output Level Control available on the front
panel of each Amplifier.
WIRING
To connect the Satellite Receiver to the Amplifiers PRO-
GRAM Input use a dual conductor shielded audio cable
with stripped wires. Connect the audio leads to HOT and
COM and the shield to G.

PROFESSIONAL AUDIO & SOUND
®
PAGE 14 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
MUSIC ON HOLD - ZONE 2 FUNCTIONS
3115 MOH Rear
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT
REMOVE COVER.THERE ARE NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION:TO REDUCE THE RISK OF FIRE,
REPLACE ONLY WITH SAMETYPE OF
FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE DE
MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE OU
DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA PLUIE OU
L©HUMIDITE, NE PAS ENLEVER LE COUVERCLE. AUCUN
REGLAGE A L©INTERIEUR. POUR REPARATION
CONSULTERUNE PERSONNE QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
41 2 3
5
PROG AUX
MOH/ZONE 2 SOURCE SELECTOR
INTERNAL MOH
AND ZONE 2
SOURCE JUMPER
Fig. 14 - Rear Panel View - MOH and ZONE 2 Output and Control
MOH/SECOND ZONE AMPLIFIER
THE FOLLOWING INSTRUCTIONS REQUIRE THE REMOVAL OF THE AMPLIFIER PROTECTIVE COVER AND ARE
PROVIDED FOR USE BY QUALIFIED PERSONNEL ONLY.
TO AVOID THE RISK OF ELECTRICAL SHOCK DO NOT PERFORM ANY INSTALLATION OR SERVICING UNLESS YOU
ARE QUALIFIED TO DO SO. REFER INSTALLATION OR SERVICING TO QUALIFIED PERSONNEL.
CAUTION ! REMOVAL OF THE AMPLIFIER COVER PRESENTS AN ELECTRICAL SHOCK HAZARD
ALWAYS REMOVE THE POWER CORD FROM THE AC WALL OUTLET
MOH AMPLIFIER FUNCTIONS
MOH AMPLIFIER
a) The MOH Amplifier can only receive programs from the AUX
Input or the PROGRAM Input.
b) Selection of the input source is by internal Jumper.
c) The two independent MOH/SECOND ZONE Outputs may be
used simultaneously.
d) The MOH 600 ohm Output is Transformer Balanced.
e) The Rear Panel MOH Amplifier Level Control operates both
the MOH and SECOND ZONE Outputs simultaneously.
MOH/SECOND ZONE OPERATION ISSUES
1) Paging from the Microphone Input or the Telephone Input does
not effect the MOH Amplifier.
2) Position of the AUX and the PROGRAM Inputs Level Control
does not affect the MOH Amplifier Output Level.
3) Muting of the AUX and PROGRAM Channels during Paging
does not effect the Output of the MOH Amplifier.
1 = 600 ohm, 1 Volt Output
2 = 8 ohm, 1 Watt Output
3 = MOH Amplifier Level Control
4 = AUX Input Jacks
5 = PROGRAM Input
MOH/SECOND ZONE AMPLIFIER
The Integrated Amplifier is equipped with an independent 1 Watt
Amplifier that can be utilized as a MUSIC ON HOLD AMPLIFIER
and as a SECOND ZONE AMPLIFIER. The MOH Output provides
a 600 ohm, 1 Volt Transformer Balanced Output. Simultaneously a
Second Zone 8 ohm, 1 Watt Output is also available.
MOH AMPLIFIER INPUT SOURCE
The program source for the Input of the MOH Amplifier can be
selected from either the AUX Input Source or the PROGRAM Input
source. See Access to the MOH Input Source Selector
Instructions.
MESSAGES ON HOLD
By utilizing a Message Repeater connected to the PROGRAM
Input Messages can be channeled to the Music on Hold Output
without effecting the other operations of the Amplifier. For more
information refer to the appropriate section in this Manual.

PAGE 15
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
MOH CONNECTIONS CAUTION: TO PREVENT POSSIBLE DAMAGE TO SPEAKERS OR THE AMPLI-
FIER ALL INPUT CONNECTIONS MUST BE MADE WITH THE AMPLIFIER OFF.
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO
NOT REMOVE COVER.THERE ARE NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
CAUTION:TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH
SAMETYPE OF FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE
DE MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE
OU DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA
PLUIE OU L©HUMIDITE, NE PAS ENLEVER LE
COUVERCLE. AUCUN REGLAGE A L©INTERIEUR.
POUR REPARATION CONSULTERUNE PERSONNE
QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
3115 MOH 00
AWG 18 TWISTED PAIR
MOH
Input
600
Ohm
Telephone System
KSU
600 ohm MOH System
MOH OTPUT LEVEL CONTROL
PROG AUX
MOH SOURCE SELECTOR
Telephone
INTERNAL MOH
SOURCE JUMPER
Fig. 15 - Rear Panel MOH Diagram MOH AMPLIFIER SOURCE SELECTOR
PROG AUX
MOH
JP5
3130-3
MOH SOURCE JUMPER JP5= AUX To change the
Selector position
lift the Mini Shorting
Plug out of the
socket pins and
re-position as
desired. Make sure
the Mini Plug is
lined up with the
socket pins.
3115 MOH JP5
Fig. 15B - MOH Input Source Jumper JP 5
MOH AMPLIFIER
The Integrated Amplifier provides an independent 600 ohm, 1 Volt
Output, Transformer Balanced MUSIC-ON-HOLD Amplifier . The Input
Source of the MOH Amplifier can be selected from either the AUX or
the PROGRAM Input.
MOH - 600 OHM SYSTEM
Most Phone systems operate on a 600 ohm Input Impedance, if the
Impedance required is 600 ohm connect the Amplifier to the Phone
System MOH by using the diagram above.
MOH - 8 OHM, 1 WATT SYSTEM
Some older Key Phone systems require a 1 watt Power Output having
an Output Impedance of 8 ohm to drive the Music on Hold feature. If
the Impedance required is 8 ohm connect the Phone system MOH to
the 8 ohm, 1 Watt MOH Output of the Amplifier. See Diagram above.
CABLE
Use a cable consisting of a twisted pair of at least AWG 18. Use care
in extending the cable and avoid routing near power lines, fluorescent
lights and other systems that may generate a disturbing electric field.
SOURCE SELECTOR
Select the Input Source desired by following the instructions at right.
LEVEL CONTROL
After the wiring is completed adjust the MOH Amplifier Level Control on
the rear panel to the preferred output level.
MUSIC ON HOLD AMPLIFIER
MOH SOURCE SELECTOR
The Source for the MOH Amplifier can be selected between
the AUX and the PROGRAM Input by setting the Jumper pro-
vided for this purpose. The Amplifier is shipped from the
Factory with the Jumper set for the AUX Input. To change the
setting do the following:
ACCESS TO THE MOH INPUT SOURCE SELECTOR
1) Remove Power Cord from AC Outlet.
2) Remove the four screws on each side of the Amplifier
securing the Top Cover to the Chassis.
3) Lift Cover and carefully slide Cover out towards the rear.
4) Locate the Printed Board No. 3130-3 attached to the rear
panel and below the AUX Input Jacks.
5) Set Jumper as required.
MOH ISSUES - The MOH Amplifier is not affected by the
Paging, Muting Functions and AUX/PGM Level Controls.

PROFESSIONAL AUDIO & SOUND
®
PAGE 16 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
MESSAGES ON HOLD CONNECTIONS
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO
NOT REMOVE COVER.THERE ARE NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICINGTO
QUALIFIED SERVICE PERSONNEL.
CAUTION:TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH
SAMETYPE OF FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE
DE MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE
OU DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA
PLUIE OU L©HUMIDITE, NE PAS ENLEVER LE
COUVERCLE. AUCUN REGLAGE A L©INTERIEUR.
POUR REPARATION CONSULTERUNE PERSONNE
QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
3115 Repeat
AWG 18 TWISTED PAIR
MOH
Input
600
Ohm
Telephone System
KSU
600 ohm MOH System
MOH OTPUT LEVEL CONTROL
PROG AUX
MOH SOURCE SELECTOR
Telephone
INTERNAL MOH
SOURCE JUMPER
SHIELD
CENTER
CONDUCTOR
MESSAGE REPEATER
Fig. 16 - Messages on Hold Diagram
MOH AMPLIFIER SOURCE SELECTOR
PROG AUX
MOH
JP5
3130-3
MOH SOURCE JUMPER JP5= PROGRAM To change the
Selector position
lift the Mini Shorting
Plug out of the
socket pins and
re-position as
desired. Make sure
the Mini Plug is
lined up with the
socket pins.
3115 MOH 02 JP5
Fig. 16B - MOH Input Source Jumper JP 5
CONNECTING THE REPEATER TO THE PROGRAM INPUT
The PROGRAM Input provides a high level (1 Volt) balanced Input (10
K ohm) that may be used to connect to a
MESSAGE REPEATER for
Messaging on Hold only through the telephone line.
1) Connect the Message Repeater Unit output to the Amplifier by fol-
lowing the diagram.
2) By referring to the
MOH AMPLIFIER INPUT SOURCE SELECTOR
section instructions set the MOH SOURCE SELECTOR to PROGRAM
(be sure to follow the Caution recommendations).
3) Turn the PROGRAM Volume Control on the front panel to ZERO, this
will prevent the signal from the Repeater to reach the Main Amplifier
Output.
4) Adjust the
MOH LEVEL CONTROL for the desired Output level to
the Telephone Line.
MESSAGE REPEATER CONNECTIONS
MOH SOURCE SELECTOR
The Source for the MOH Amplifier can be selected between
the AUX and the PROGRAM Input by setting the Jumper pro-
vided for this purpose. The Amplifier is shipped from the
Factory with the Jumper set for the AUX Input. To change the
setting do the following:
ACCESS TO THE MOH INPUT SOURCE SELECTOR
1) Remove Power Cord from AC Outlet.
2) Remove the four screws on each side of the Amplifier
securing the Top Cover to the Chassis.
3) Lift Cover and carefully slide Cover out towards the rear.
4) Locate the Printed Board No. 3130-3 attached to the rear
panel and below the AUX Input Jacks.
5) Set Jumper as required.

PAGE 17
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
ZONE 2 CONNECTIONS
CLASS 2 WIRING ACCEPTABLE
SER. NO.
COM 70V
MUTE
GROUND
LINE FUSE
1.6A 250 V
CAUTION;TO REDUCE THE RISK OF FIRE OR SHOCK DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO
NOT REMOVE COVER.THERE ARE NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
CAUTION:TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH
SAMETYPE OF FUSE.
ATTENTION: AFIN DE
REDUIR LE RISQUE
D©INCENDIE, REMPLACER
SEUL PAR UN FUSIBLE
DE MEME TYPE.
MOH OUTPUT
LEVEL
AUX
47K ohm 200 Mv
IN PARALLEL
ATTENTION: POUR REDUIRLES RISQUES D© INCENDIE
OU DE CHOC ELECTRIQUE, NE PAS EXPOSER A LA
PLUIE OU L©HUMIDITE, NE PAS ENLEVER LE
COUVERCLE. AUCUN REGLAGE A L©INTERIEUR.
POUR REPARATION CONSULTERUNE PERSONNE
QUALIFIEE
117V 60 Hz
500 W MAX.
UNSWITCHED
AMPLIFIER
POWER RATING
SUPPLY VOLTAGE
POWER CONSUMPTION
15 W RMS
117V 60 HZ
570 VA
T3115BGM 8 OHM
1 WATT
8 25V
600 ohm
1 Volt
AUX
ATTENUATOR
L
R
TEL OUTPUT
LEVEL
600 OHM
100 MV
10K OHM
1 V
250 OHM
1 MV
TELMICPROGRAM
GHOTCOMGHOTCOMGHOTCOMUNMUTE G
BALANCED BALANCED BALANCED
MOH OUTPUT
3115 Zone 2
MOH/ZONE 2 OTPUT LEVEL CONTROL
PROG AUX
MOH/ZONE 2 SOURCE SELECTOR
INTERNAL MOH
SOURCE JUMPER
AWG 18
TWISTED PAIR
Up to Four 8 ohm Speakers may
be Connected
1/4W
1/4W
1/4W
1/4W
8
OHM
8
OHM
8
OHM
8
OHM
4 Speaker System Max. Power Output= 1/4W Each
ZONE 2
Fig. 17 - Rear Panel - ZONE 2 Connection
ZONE 2 OPERATION
The 1 Watt Output of the MOH Amplifier may be utilized to power up to 4
speakers in various combinations as described in the diagrams on this
page. This feature will provide a SECOND ZONE with up to 1 Watt of power
and will amplify only the Source from either AUX or PROGRAM (see
source selection) and will not be affected by the Paging (from MIC or TEL)
or Muting.
It can be used in any area (up to 1 Watt) where only the Program Source
is desired uninterrupted by Paging.
CABLE
Use an AWG 18 jacketed, twisted pair cable.
SOURCE SELECTOR
Select the Input Source desired by following the instructions in the MOH
Amplifier Source Selection section.
LEVEL CONTROL
After the wiring is completed adjust the MOH Amplifier Level Control on the
rear panel to the desired output level.
ZONE 2 OPERATION ZONE 2 SPEAKER(S) WIRING
3115 MOHspk01
8 ohm
+
-
Max. Power Output
1 Watt
MOH OUTPUT
MOH
OUTPUT LEVEL
8 OHM
1 WATT
600 ohm
1 Volt
3115 mohspk02
+
-
+
-
8
ohm
8
ohm
Max. Power
Output
½ Watt ¼ W ¼ W
MOH OUTPUT
MOH
OUTPUT LEVEL
8 OHM
1 WATT
600 ohm
1 Volt
Fig 17A - One 8 ohm Speaker
3115 mohspk03
Max. Power Output
1 Watt
8 ohm
+
-
+
-
+
-
+
-
8 ohm 8 ohm
8 ohm
¼ W ¼ W
¼ W
¼ W
MOH OUTPUT
MOH
OUTPUT LEVEL
8 OHM
1 WATT
600 ohm
1 Volt
Fig 17B - Two 8 ohm Speakers Fig 17C - Four 8 ohm Speakers
Fig. 17B shows two 8 ohm speakers connected in
series (16 ohm total). To achieve a 1 watt output (½ watt
per speaker) use two 4 ohm speakers instead.
CONNECTING SPEAKERS

PROFESSIONAL AUDIO & SOUND
®
PAGE 18 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
OUTPUT CONNECTIONS
SERIES - PARALLEL - SERIES PARALLEL INSTALLATIONS
In applications requiring a small number of speakers, the speaker
line can be connected to the 8 ohm impedance output of the
Amplifier. The speakers available should be wired either in series,
parallel or series parallel combinations to match the output imped-
ance of 8 ohm. Impedance matching is essential to provide maxi-
mum power transfer and efficiency.
CAUTION
1) If the total load impedance of the speakers used is greater than
8 ohm less then the total power of the amplifier will be transferred
to the speakers.
2) If the total load impedance of the speakers used is lower than 8
ohm the mismatch will cause an overload of the output and may
trip the Amplifier Overload Protective System.
Fig. 18B - Series-Parallel Connection Diagram
PRECAUTIONS: THE AMPLIFIER UTILIZES A BALANCED SPEAKER OUTPUT SYSTEM ON BOTH 8 OHM AND 25/70
VOLT SYSTEM OUTPUTS.
1) DO NOT CHASSIS GROUND THE SPEAKER OUTPUT TERMINALS.
2) MAKE SURE THAT THE SPEAKER WIRES ARE NOT SHORTING OUT AT THE TERMINAL STRIP.
3) MAKE SURE THAT THE OUTPUT TERMINALS PROTECTIVE COVER IS REPLACED AFTER ALL THE SPEAKER
WIRING AND CONNECTIONS ARE COMPLETED.
4) PRIOR TO THE INSTALLATION AND WHEN USING THE 70 VOLT LINE SYSTEM CHECK THE LOCAL ELECTRICAL
CODES REGULATING THE WIRING OF THE SYSTEM.
spkout03
8 ohm
+
-
+
-
+
-
+
-
8 ohm 8 ohm
8 ohm
COM 8 25V 70V
LOW IMPEDANCE SYSTEMS
spkout01 COM 8 25V 70V
16 ohm16 ohm
++
--
Z Load
=Z Spkr 1
-----------------
2
Fig. 18A - Parallel Connection Diagram
Fig. 18 - Series Connection Diagram
spkout04
+
-
+
-
4
ohm
4
ohm
COM 8 25V 70V
Z Load
=Spk 1 + Spk 2

PAGE 19
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICET3115/3130/3160BGM
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
INTEGRATED AMPLIFIERS
OUTPUT CONNECTIONS
25 VOLT AND 70 VOLT CONSTANT VOLTAGE DISTRIBUTION SYSTEMS - In applications requiring a large number of speakers that
are located at a far distance from the amplifier a 25 Volt or a 70 Volt Constant Voltage method is most widely used.
MAIN ADVANTAGES IN USING THE HIGH IMPEDANCE METHOD
1) All speakers are connected in parallel usually on to a single speaker line.
2) The Amplifier Output Voltage is constant over a very wide range of load impedance.
3) The Amplifier Output Voltage remains practically constant if loudspeakers are connected or disconnected from the line.
4) Different acoustic power can be allocated in each area as required by using the power taps on the speaker line transformer.
5) Since the system provides a higher voltage at a lower current, resistive loss in the cable is reduced resulting in a higher efficiency.
6) Calculations of the output power needed and the speaker power requirements are simple and easily accomplished.
CONSTANT VOLTAGE DISTRIBUTION SYSTEMS
spkout05
0.6
5
0
2.5
1.25
0.6
5
0
2.5
1.25
0.6
5
0
2.5
1.25
0.6
5
0
2.5
1.25
spk 1 spk 2 spk 3 spk 4
70 Volt
Transformer
70 Volt
Transformer
70 Volt
Transformer
70 Volt
Transformer
Total Speaker Load Calculation
TL = SPK1+SPK2+SPK3+SPK4
TL=1.25+1.25+2.5+5 = 10 Watt
COM 8 25V 70V
Fig. 19 - 70 Volt Constant Voltage System Diagram
INSTALLATION TIPS
1) Determine the amount of speakers required for the
installation and their location.
2) Choose the power output needed for each speaker (typ-
ically 1.25 Watt for background music applications and 5-
10 Watt for paging horns).
3) Add all the speaker taps wattage (see Fig. 13) and be
sure that the total power needed does not exceed the
Rated RMS Power Output of the Amplifier
4) Procure a jacketed, two conductor cable of at least 18
gauge.
5) Carefully route cable starting with the farthest speaker
in the system and until all speakers are reached by the
cable and terminating at the Amplifier location. The best
cable route is determined by the individual application.
6) Connect each speaker in accordance to the power out-
put required by selecting the corresponding Power Tap.
IMPORTANT NOTE: Make sure that the unused stripped
power tap wires are INDIVIDUALLY INSULATED and do
not touch each other or an amplifier overload will occur.
7) Connect the speakers cable to the
25 Volt or 70 Volt and
COM output terminals of the Amplifier, turn the system on
and balance the various speakers accordingly. The selec-
tion of the Constant Voltage (25 Volt or 70 Volt) is deter-
mined by the speakers used. All speakers must operate at
the same constant voltage and cannot be mixed.
LINE ATTENUATORS
In installation requiring that one or a group of speakers
have an independent level control a Line Attenuator can
be utilized. The Fig. 13A shows the use of a PASO model
VC20 - 20 Watt Attenuator used to control two speakers
simultaneously. The wire colors pertain to the VC20, if
other types are used follow the directions supplied with the
unit.
By turning the stepped switch of the VC20 the level of
speakers SPK 1 and SPK 2 can be adjusted, up or down,
from 0 (no output) to the maximum output determined by
the tap utilized on the speakers (in this example 2.5 Watt
max.). Speakers SPK 3 and SPK 4 are not affected.
NOTE: The total power required for all the speaker or
speakers to be controlled should not exceed the Power
Handling rating of the Attenuator. Example: the maximum
load for the VC20 is 20 Watt.
WIRING
spkout06
0.6
5
0
2.5
1.25
0.6
5
0
2.5
1.25
spk 3 spk 4
70 Volt
Transformer
70 Volt
Transformer
Total Speaker Load Calculation
TL = SPK1+SPK2+SPK3+SPK4
TL= 2.5+2.5+2.5+2.5 = 10 Watt MAX.
0.6
5
0
2.5
1.25
spk 1
70 Volt
Transformer
0.6
5
0
2.5
1.25
spk 2
70 Volt
Transformer
RED
BLUE
BLACK
PASO VC20 ATTENUATOR
COM 8 25V 70V
Fig. 19A - Using a Line Attenuator Diagram

PROFESSIONAL AUDIO & SOUND
®
PAGE 20 Specifications are subject to change without notice T3115/3130/3160BGM
INTEGRATED AMPLIFIERS
INSTALLATION AND WIRING
FRONT PANEL CONTROLS Fig. 20 - Front Panel Controls
INPUT CONTROLS
MICROPHONE INPUT CONTROL
A microphone volume control is provided to adjust the level of the
microphone input. Rotate control clockwise to increase volume.
Set the control to “0” position when the input is not in use.
TELEPHONE PAGING LEVEL CONTROL
The Telephone Paging Input Control is located on the rear panel.
Rotate control clockwise to increase the Output Level. Set the con-
trol to “0” position when the telephone paging input is not in use.
AUX INPUT CONTROL
A front panel Volume Control is provided to adjust the level of the
Auxiliary input. Rotate control clockwise to increase the Output
Level of the signal connected to this input.
AUX ATTENUATOR
A rear panel Attenuator Control sets the Sensitivity of the AUX
Input. To adjust the Sensitivity do the following:
1) Turn the Attenuator Control to Zero (counterclockwise).
2) Connect a Program Source to the AUX Input
3) Set the AUX Control on the front Panel to 5.
4) Turn the Attenuator Control to the desired output.
PROGRAM INPUT CONTROL
A front panel Volume Control is provided to adjust the level of the
Program input. Rotate control clockwise to increase the Output
Level of the signal connected to this input. Set the control to “0”
position when the telephone paging input is not in use.
ACOUSTIC CORRECTION
CAUTION: EXCESSIVE BOOST SETTING OF EITHER BASS OR
TREBLE CONTROLS, MAY DAMAGE SPEAKERS.
BASS CONTROL
Use this control to set the tonal balance of the amplifier. The con-
trol center position, indicated by a ``0'', provides a flat response.
To reduce the Bass response (bass cut) rotate control counter-
clockwise. To increase the Bass response (bass boost) rotate
control clockwise.
Use this control to minimize Acoustic Feedback (howling) by set-
ting the control in the CUT range 0 to -5. ALWAYS set control in
the BASS-CUT position when using horn type speakers.
Excessive bass response may damage the speaker's driver
diaphragm.
TREBLE CONTROL
Use this control to set the tonal balance of the amplifier. The con-
trol center position, indicated by a ``0'', provides a flat frequency
response. To reduce the High Frequency response (high cut)
rotate control counterclockwise. To increase the High Frequency
response (high boost) rotate control clockwise. USE this control
to minimize possible white or hiss noise by setting control in the
HIGH-CUT range 0 to -5.
TURNING THE AMPLIFIER ON
PRECAUTIONS
POWER SWITCH - DO NOT turn the amplifier On until all input and output connections have been made.
MAKE SURE that all volume controls are in the ``0'' position before turning the amplifier On. Excessively high setting of the volume con-
trols may damage the speakers.Turn amplifier ON by setting the front panel POWER SWITCH to the ON position.The pilot light on the
front panel should glow normally.
O
56
7
8
2
1
010
9
3
4
.
.
..
.
.
.
.
.
.
.
56
7
8
2
1
010
9
3
4
.
.
..
.
.
.
.
.
.
.2
1
3
44
10
-5 5+
3
2.
.
..
.
.
.
.
.
.
.2
1
3
44
10
-5 5+
3
2.
.
..
.
.
.
.
.
.
.
SERIES 3000 INTEGRATED AMPLIFIER
MIC PROGRAM BASS TREBLE POWER
3115cont
2 3 4 5 6
56
7
8
2
1
010
9
3
4
.
.
..
.
.
.
.
.
.
.
1
AUX
PROFESSIONAL AUDIO& SOUND
®
1) MICROPHONE Input Volume Control
2) AUX Volume Control
3) PROGRAM Volume Control
4) Bass Control
5) Treble Control
6) On-Off Power Switch