Inter-m PA-2312 User manual

PA-2312 Public Address 2 CH Power Amplifier
ON
10 911
CLI P
- 10dB
- 40dB
P
ROT
12
13
15
17
19
22
29
54
0
1
2
3
4
5
6
7
8
00
CHANNEL 1
10 911
CLI P
- 10dB
- 40dB
PROT
12
13
15
17
19
22
29
54
0
1
2
3
4
5
6
7
8
00
CHANNEL 2
POWER
OFF
PA
2312
PUBLIC ADDRESS 2CH POWER AMPLIFIER
* Rack mount products in the Western Hemisphere(North America, South America,
and the Caribbean) do not have handles installed due to customer preference.
PA-2312_E(215.9*279.4) 05.12.13 6:48 PM 페이지2

Contents
Contents
1. Unpacking and Installation.....................................................................................................1
2. Features ................................................................................................................................2
3. Front Panel Controls...............................................................................................................3
4. Rear Panel Controls ...............................................................................................................4
5. Applications ..........................................................................................................................6
6. Block Diagram.......................................................................................................................7
7. Specifications.........................................................................................................................8
OFFICE :
226-9 DUGJUNG - LI, HOE CHUN - EUB,
YANGJU - KUN, KYUNGKI - DO, KOREA
TEL : [phone]~5, FAX : [phone]
Home Page : http://www.inter-m.co.kr
E-mail : [email protected]

Unpacking and Installation
Unpacking and Installation
Although it is neither complicated to install nor difficult to operate your PA Amplifier, a few minutes of your
time is required to read this manual for a properly wired installation and becoming familiar with its many
features and how to use them. Please take a great care in unpacking your set and do not discard the carton
and other packing materials. They may be needed when moving your set and are required if it ever
becomes necessary to return your set for service.
Never place the unit near radiators, in front of heating vents, in excessively humid or dusty location to avoid
early damage and for your years of quality use. Connect your complementary components as illustrated in
the following page.
PA-2312 1
PUBLIC ADDRESS 2 CH POWER AMPLIFIER
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
This symbol is intended to alert the user to the
presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be of suf-
ficient magnitude to constitute a risk of electric
shock to persons.
This symbol is intended to alert the user to the
presence of important operation and mainte-
nance (servicing) instructions in the literature
accompanying the appliance.
Caution: To prevent electric shock do not use this (polarized) plug
with an extension cord, receptacle or other outlet unless
the blades can be fully inserted to prevent blade expo-
sure.
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
fiche polarisée avec un prolongateur, une prise de
courant on une autre sortie de courant, sauf si les
lames peuvent étre insérées à fond sans en laisser
aucune partie à découvert.

Features
Features
- 2 CHANNEL POWER AMPLIFIER
This unit is composed of two power amplifier circuits.
- GAIN VOLUME ADJUSTMENT & OUTPUT LEVEL INDICATOR IN FRONT PANEL
Gain volume is located at the front panel, so you can easily control output level. And you can monitor out-
put level throughout LED indicator in front panel.
- THERMAL PROTECTION & AUTOMATIC IDLING CiRCUITRY
To insure stability and reliability against over-current and over-heating, thermal protection circuitry is pro-
vided. In addition, automatic idling circuit is provided to protect against thermal run-away.
- BALANCED INPUT
A balanced input is provided to reduce hum pick up from a long distance input cable and to avoid ground
loop problem when you build the system.
- USE OF EMERGENCY BATTERY
You can operate this PA amplifier by using emergency battery for unexpected AC power failure.
PA-2312
2
PUBLIC ADDRESS 2 CH POWER AMPLIFIER

Front Panel Controls
Front Panel Controls
1. POWER INDICATING LED
This LED indicates power is turned ON.
2. POWER SWITCH
Pressing this switch to ON will make the power indicating LED ON and supply the power to unit.
3. OUTPUT LEVEL INDICATORS
These LEDs indicates the output level of this amplifier. Be sure not to operate the unit with the clip LED
ON continuously (RED).
4. PROTECTION INDICATOR
This LED indicates the condition of the protection circuit. When the protection LED is “ON” the amplifier
is not operating normally (overheating and limiting), please check the INPUT/OUTPUT condition of the
amplifier.
5. LEVEL ADJUSTMENT VOLUME
This volumes control output levels.
PA-2312 3
PUBLIC ADDRESS 2 CH POWER AMPLIFIER
PUBLIC ADDRESS 2 CH POWER AMPLIFIER
PA-2312
ON
4
10 911
CLIP
-10dB
-40dB
PROT
12
13
15
17
19
22
29
54 0123
4
5
6
7
8
00
CHANNEL 1
10 911
CLIP
-10dB
-40dB
PROT
12
13
15
17
19
22
29
54 0123
4
5
6
7
8
00
CHANNEL 2
POWER
OFF
12
3
5

Rear Panel Controls
Rear Panel Controls
1. FAN
The fans should be kept free of all obstructions and be accessible to cool fresh air when possible. It is
important that the fans be used in a dust free environment.
2. SPEAKER OUTPUT TERMINALS
These terminals are for connection of speaker lines to deliver power output to speakers. Impedance (volt-
ages) of 4 ohm, 25V, 70V and 100V are provided for convenience. In any case, use the speakers
whose combined impedance is equal to or higher than the rated output impedance of amplifier.
* 100V or 25V can be selected optionally.
3. AC INLET
This terminal is connected AC input cord.
4. FUSE DRAWER
These fuse drawer contains AC fuse. Replace them with the same type fuse when they are blown out. If
they continuously blow, stop replacing fuses and refer servicing to qualified personnel.
5. HIGH-PASS FILTER SWITCH
This switch is for activating the High-pass Filter circuit, to protect speakers from excessive low frequency
power demands. The -3dB frequency of the High-pass Filter is 400Hz.
PA-1000B/1000BR
4
PUBLIC ADDRESS RECEIVER
UTOUTP
CH 1
+
DC INPUT
24V
FRAMEFLOAT
GROUND
LIFT
22V ( 4Ω)B
70V ( 21Ω)A
100V (41Ω)
COM
CH 2
CH 1
CH 2
BALANCED INPUT LINK
HPF
OFFON
HPF
OFFON
TO REDUCE THE RISK OF FIRE
REPLACE ONLY WITH SAME TYPE FUSE.
CAUTION;
UTILISER UN FUSIBLE DE RECHANGE
DE
MEME TYPE.
NO USER SERVICEABLE PARTS INSIDE.
RISQUE DE CHOC ELECTRIQUE NE
CTRIC SHOCK, DO NOT REMOVE COVER.
REFER SERVICING TO QUALIFIED SERVICE
CAUTION;
AVIS;
TO REDUCE THE RISK OF ELE-
PERSONNEL
PAS
OUVRIR.
OUTPUT POWER : 120WX2
MADE IN KOREA
MODEL NO. PA-2312
PUBLIC ADDRESS
2 CH POWER AMPLIFIER
SN
~AC INPUT
230V 50Hz, 290W
FUSE
T4AL/250V
123
4 5 6 7 8
4Ω25V 70V 100V
22V 5.2Ω42Ω83Ω

5
PA-2312
6. INPUT JACKS
These input jacks and terminals are for the balanced input signal. You can connect amplifiers in parallel
by using XLR jack.
7. EARTH LINK SWITCH
This slide switch provides for separation of “safety” earth and “safety” earth to prevent from hum loops.
8. DC INPUT TERMINALS
These terminals are for connecting DC power supply of battery. Connect red colored terminal to positive
lead of battery and black colored one to negative lead of battery.
PUBLIC ADDRESS 2 CH POWER AMPLIFIER

6PA-2312
PUBLIC ADDRESS 2 CH POWER AMPLIFIER
Applications
Applications
UTOUT P
CH 1
+
DC I NPUT
24V
FRAMEFLOAT
GROUND
LIFT
22V (4Ω)B
70V (21Ω)A
100V (41Ω)
COM
CH 2
CH 1
CH 2
BALANCED INPUT LINK
HPF
OFFON
HPF
OFFON
TO REDUCE THE RISK OF FIRE
REPLACE ONLY WITH SAME TYPE FUSE.
CAUTION;
UTILISER UN FUSIBLE DE RECHANGE
DE
MEME TYPE.
NO USER SERVICEABLE PARTS INSIDE.
RISQUE DE CHOC ELECTRIQUE NE
CTRIC SHOCK, DO NOT REMOVE COVER.
REFER SERVICING TO QUALIFIED SERVICE
CAUTION;
AVIS;
TO REDUCE THE RISK OF ELE-
PERSONNEL.
PAS
OUVRIR.
OUTPUT POWER : 120WX2
MADE IN KOREA
MODEL NO. PA-2312
PUBLIC ADDRESS
2 CH POWER AMPLIFIER
SN
~AC INPUT
230V 50Hz, 290W
FUSE
T4AL/250V
SWITCHED
DC OUT 24V
5A MAX
( )
( )
(RACK ONLY)
MIC
PS-9116
SPEAKER
PB-9207A
AC INPUT
BATTERY
(DC24V)
PD-9359
TURN TABLE
(CD, TUNER.....)
PP-9214
AC INPUT : 220V 60Hz, 139VA
FUSE : 1A / 250V
MADE IN KOREA
BATTERY CHARGER
MODEL NO. PB-9207A
~
BATTERY IN
( )
( ) N
DC INPUT
24V
LINE
INSERT INSERT REC OUTPUT PRIORITY INPUT
MIC MIC MIC MIC MIC MIC MIC MIC
CH 2
OUTPUT OUTPUT
MUTE
ON
OFF
SN
LINE LINE LINE LINE LINE LINE
CH 5 CH 4 CH 3 CH 2 CH 1CH 8 CH 7 CH 6
CH 1
CH 12 CH 10CH 11 CH 9
CH 8 CH 7 CH 6 CH 5 CH 4 CH 3 CH 2 CH 1
-
+
DC INPUT
24V CH 16 CH 15 CH 14 CH13 CH 12 CH 11 CH 10 CH 9
AMP IN 1
AMP IN 2
ALL
GROUP 1
GROUP 2
TIMER REMOTE
(+)
(-)
(+)
(-)
SN
EMERGENCY
AC FUSE
4A/250V
DC FUSE
10A/250V
SWED 1 (2000W)
SWED 2 (2000W)
SWED 3 (2000W)
SWITCHED DC OUT 24V
UNSWITCHED
DC OUTPUT 24V REMOTE
C-SW-H
GND
BATTERY
INPUT
( )
( )
UNSWED (700W)
(AMP ONLY)
~AC INPUT
220V/60Hz,217VA
SN
HOT
ON
( )
( )
BATTERY
(DC24V)
( )
( )

7
PA-2312
PUBLIC ADDRESS 2 CH POWER AMPLIFIER
Block Diagram
Block Diagram

8PA-2312
PUBLIC ADDRESS 2 CH POWER AMPLIFIER
Specifications
Specifications ..........................................................0dB=0.775Vrms
- ELECTRICAL
Rated Output (THD 1%).......................................................................................................120W (RMS)
..............................................................................................................................................4Ω(22V)
...........................................................................................................................................5.2Ω(25V)
............................................................................................................................................41Ω(70V)
..........................................................................................................................................83Ω(100V)
Input Sensitivity/Impedance..............................................................................................1V/10kΩ, BAL
Frequency Response (+1/–3dB) ...........................................................................................70Hz-20kHz
T.H.D .................................................................................................................................Less than 1%
S/N .............................................................................................................................Better than 95dB
HPF ................................................................................................................................–3dB at 400Hz
Channel Separation .......................................................................................................Less than –70dB
- GENERAL
Power Source ..................................................................................AC 110V–240V, 50/60Hz, DC 24V
Power Consumption .....................................................................................................................290W
Weight..........................................................................................................................................20kg
Dimensions...............................................................................................482(W) 132(H) 280(D)mm
* Specifications and design subject to change without notice for improvements.

MADE IN KOREA
December 2005 9007907712 B
Inter-M, Ltd. (Korea) began operations in 1983.
Since then, Inter-M has grown to become one of the largest manufacturers
of professional audio and commercial sound electronics equipment in the world.
Inter-M has gained worldwide recognition for its own branded products,
as well as private label manufacturing of electronics sold under other names (OEM).
The company is no longer just a Korean company, but rather a global company
that is truly international in scope, with factories and offices in Korea and China,
and sales and marketing operations located in Japan, Europe, and the U.S.A.
With more than 850 employees around the globe,
Inter-M is well-poised for further growth and expansion.
INTER-M AMERICAS, INC.
1 EAST BEACON LIGHT LANE CHESTER, PA USA 19013-4409
TEL : [phone], FAX : [phone]
Home Page : http://www.inter-m.net, E-mail : [email protected]
INTER-M Corporation
SEOUL OFFICE:653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA
TEL : [phone]~8, FAX : [phone]
Home Page : http://www.inter-m.com, E-mail : [email protected]
PA-2312_E(215.9*279.4) 05.12.13 6:48 PM 페이지1