Advanced Visual Solutions AVSP60 User manual

Advanced Visual Solutions Ltd
Unit 2, Eastman Way
Hemel Hempstead, Hertfordshire HP2 7DU
Telephone : ( 01442 ) 252280 Fax : ( 01442 ) 244578
Email : [email protected].uk : Website : avsl.com
Model
AVSP60 & AVSP120
60 Watt and 120 Watt
Public Address Mixer
Amplifiers
Installation and Operating
Instructions
Document No. AVSP120-OEM03 REVISION 2.1 7th November 2005

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Contents
1. Unpacking & Installation......................................... 3
2. Features ................................................................... 4
3. Front Panel Controls............................................... 5
4. Fuse Ratings............................................................ 8
5. Input Connections................................................... 9
6. Connecting ADPRO remote transmitters .............. 10
7. Installation of the Speaker(s).................................. 11
8. Specifications.......................................................... 13
Illustrations and Diagrams
9. Front Panel Controls............................................... 5
10. Rear Panel Controls & Connections..................... 6
11. Channel Input Connections (XLR) ........................ 9
12. Loudspeaker Connection Examples..................... 11
13. Circuit Block Diagram............................................ 12
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 2 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Unpacking and Installation
Although it is neither complicated to install nor difficult to operate your Public Address 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 radiator, in front of heating vents, to direct sunlight, in excessive
humid or dusty locations to avoid early damage and for years of quality use. Connect your
complementary components as described or illustrated in the following pages.
To prevent fire or shock hazard, do not
Expose the unit to rain or moisture.
** CAUTION **
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
CAUTION TO REDUCE THE RISK OF ELECTRIC
SHOCK DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
This symbol is intended to alert the user to the
presence of uninsulated “dangerous Voltage”
within the product’s enclosure that may be of
sufficient 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
maintenance (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
p
revent blade ex
p
osure
WARNING
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 3 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Features
 MODULAR AMPLIFIER
This amplifier is perfect for applications requiring high reliability and excellent audio
quality.
The units assemble in any configuration, AMP+Tuner, AMP+CD (Deck),
AMP+Tuner+CD (Deck), utilizing optional modules.
 INPUT GAIN CONTROLS
This system allows adjustment to the input gain on the rear panel. Input gains are
adjustable per channel, for the ultimate convenience.
 INPUT EQ CONTROLS
This system allows adjustment to the input eq (Low Frequency, Mid-Frequency and
High Frequency) on the rear panel. Input eq controls are adjustable per channel, for the
ultimate convenience.
 SPEAKER SELECT
6 speaker selector switches are provided to enable you to select 5 speaker zones
individually or all speaker zones globally. These may be operated by remote-control via
the 13 pin MINIDIN connector on the rear panel.
 CHIME WITH FOUR TONES
You can use the built-in four-tone chime before the announcement.
 MUTING FOR PRIORITY
Channel 1, Channel 2, CHIME and TELEPHONE have priority over the others signal.
 TELEPHONE INPUT
Allows a connection from the telephone system. The function of TELEPHONE INPUT is
allows a remote announcement or paging facility via a standard telephone line or PABX
analogue line.
 MUSIC-ON HOLD
Allows a connection to the telephone system. The function of Music-on-Hold is to
provide an output to the local telephone system’s Music-on-Hold input so that callers on
“hold” hear the current output of the optional radio tuner module.
NOTE : Music-on-Hold is only applicable when the optional AVPRTM Radio Tuner
module is fitted.
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 4 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Front Panel Controls
12 3
4
5
6
7
9 8
1. DECK, CD PLAYER OR TUNER OPTION
These panels are used for connecting the CD player or TUNER.
*Connection of option is provided by means of a connector inside the unit.
2. 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.
3. OUTPUT LEVEL DISPLAY
This display indicates the output level (RMS).
4. POWER SWITCH
Pressing this switch to ON will supply the power to this unit.
The power indicator LED illuminates when the unit is switched on and receiving power.
5. SPEAKER SELECTOR
These switches are used for connecting the output of amplifier to the speaker zones
individually or globally.
6. CHIME BUTTON
Pressing this button will activate the internal, 4-tone chime circuit.
7. MASTER VOLUME
This control is used for adjusting the overall volume of the mixed audio.
8. TONE CONTROL
High and Low frequency level is adjusted to ±12dB by these 2 controls from 100Hz to 10kHz.
9. Channel 1 ~ Channel 6 VOLUME
These controls adjust the individual volume levels of Channels 1 to 6.
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 5 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Rear Panel Controls
1 2 3 45
6
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
17
1. SPEAKER OUTPUT TERMINALS
These terminals are for connection of speaker lines to deliver output to the speaker zones.
Impedance (voltages) of 4Ω,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
the amplifier.
NOTE : Only the 70V & 100V speaker terminals are controlled by the front-panel Zone selector
switches
2. IMPEDANCE SELECTOR SWITCH
This switch is for selecting the impedance (Output Line Voltage)
AVSP60 165 Ohms (100V Line) or 83 Ohms (70V Line)
AVSP120 83 Ohms (100V Line) or 42 Ohms (70V Line)
3. ANTENNA (AERIAL) : (Only used for Tuner Option Module)
This terminal is for connecting the antenna terminal, when you use the Optional Tuner Module.
4. PHANTOM POWER SWITCH
These switches turn on or off the phantom power supply for each channel.
Use this switch when you are using condenser microphones which require phantom power.
When this switch is turned on, +24 Volts DC will be supplied to pins 2 and 3 of each INPUT
connector.
If you do not need phantom power, (e.g. when using a dynamic microphone), be sure to leave
the switch turned off.
It is safe to connect balanced dynamic microphones or line level devices even if this switch is
left on, but connecting unbalanced devices or devices whose transformers are center-grounded
will cause hum or malfunctions.
5. PRIORITY SWITCH
These switches give priority to the channel to which they belong.
6. H.F. EQUALISER CONTROL
This Eq. section provides ±12dB of control over high frequencies, centered around 10kHz.
7. M.F. EQUALISER CONTROL
This Eq. section provides ±12dB of control over medium frequencies, centered around 1kHz.
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 6 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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8. L.F. EQUALISER CONTROL
This equalizer section provides ±12dB of control over low frequencies, centered around 100 Hz.
9. INPUT TRIM CONTROL
This control should be adjusted according to the input signal source. It should be set so that the
input signal does not exceed input sensitivity. When the input level exceeds the rated sensitivity,
the audio output signal of the amplifier will be distorted and may overload the output stage. Gain
adjustment range of these controls is 44dB, and, as a general guide, the position of these
controls will typically be as follows: -
DYNAMIC MICROPHONE .....................-50 ~ -60dB
ELECTRET MICROPHONE ...................-30 ~ -50dB
AUX. (FastScan ETC.)............................…0 ~ -20dB
10. Channel 1 ~ Channel 6 INPUT CONNECTORS (XLR)
These input connections are designed to accept balanced-line signals. Unbalanced devices
may be used by connecting the “cold” terminal to ground (ensure that Phantom Power is OFF).
In this case, use this terminal for the cable screen connection (SEE CONNECTION DRAWING).
11. LINK IN JACK
Allows the expansion of input channels. This jack is provided to accept an input from the output
terminal of an external mixer or other device. Inserting a plug into this connector does not affect
the operation of the system.
12. AMP IN JACK
This jack is for connecting an external signal to the power amplifier input. When a plug is
inserted into this jack, the mixed signal of all the local inputs are disconnected from the power
amplifier, and only the external signal connected to this jack are heard.
13. PREAMP OUT JACK
This jack is for connecting the on-board mixer/preamp output signal to an external device. When
a plug is inserted into this jack, the mixed signal of all the local inputs are disconnected from the
power amplifier. This method of connection is known as an “effects Loop”. The PREAMP OUT
is the “send” path, and the AMP IN is the “Return” path.
14. LINK OUT JACK
This jack is used to connect the on-board mixer/preamp output to an external amplifying or
recording device (e.g. a second power amplifier or an audio recording system). Inserting a plug
into this connector does not affect the operation of the system.
15. DC POWER INPUT TERMINALS
These terminals allow the unit to be powered by batteries instead of mains AC. This may be
used as a “Power Fail” backup. Take care to observe polarity!
16. DC FUSE HOLDER
This fuse holder contains the DC POWER fuse. When the fuse is “blown”, it should be replaced
with a fuse of exactly the same type and rating. If it continues to blow, do not replace fuse again
and refer servicing to qualified personnel.
17. AC FUSE HOLDER
This fuse holder contains the AC MAINS fuse. When the fuse is “blown”, it should be replaced
with a fuse of exactly the same type and rating. If it continues to blow, do not replace fuse again
and refer servicing to qualified personnel.
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 7 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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18. MAINS POWER INLET CORD (Captive)
19. EXT. MUTE
When these terminals are short-circuited, the signals from Channel 3 to Channel 6, Tuner
module and CD Player module are muted. The signals from Channel 1, Channel 2, LINK IN and
CHIME are not muted. You can use these terminals for remote controlled muting and cascading
amplifiers.
20. EXT. CHIME
When these terminals are short-circuited, the 4-tone chime circuit is activated. You can use
these terminals for remote controlled chiming and cascading amplifiers.
21. TELEPHONE IN TERMINAL
These Input terminals allow a telephone exchange line or PABX analogue line to be used for
paging.
NOTE : When a signal of sufficient amplitude appears at this terminal, all other input signals
except AMP IN are muted. You can adjust the input level sensitivity by means an internal gain
control, from 200mV to 1000mV.
22. MUSIC-ON HOLD (AVSP-TUNER FITTED ONLY)
These Output terminals are for connecting to a telephone system’s “Music On Hold” input.
NOTE : When the tuner is turned on, the tuner’s output signal is always supplied these terminals
and is not affected by master volume and tuner volume controls. You can adjust the Output
level by means an internal gain control.
FUSE RATINGS
MODEL @ 100-120 Volts AC :
50/60Hz @ 220-240 Volts AC : 50/60Hz @ 24 Volts DC
AVSP60 3000 mA @ 250V 1500 mA @ 250V 5000 mA @ 250V
AVSP120 5000 mA @ 250V 2500 mA @ 250V 10000 mA @ 250V
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 8 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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CONNECTING AUDIO SOURCES TO THE AMPLIFIER
Audio sources generally fall into one of two categories, namely BALANCED and UNBALANCED
(unbalanced sources are sometimes referred to as “single-ended”). Unbalanced sources use
the cable screen (normally Earthed) as one of the conductors and tend to be high impedance
(typically 47K Ohms or more). Balanced types tend to be low impedance (600 Ohms or less).
Electret condenser microphones require a supply Voltage to operate. This is usually provided
from an internal battery, but some can also use power supplied down the cable. This is known
as “PHANTOM POWER” and is available on all inputs (CH1-CH6) of the amplifier.
**CAUTION** When using any source which is not phantom-powered ENSURE THAT THE
PHANTOM SWITCH IS OFF FOR THAT CHANNEL.
CONNECTION TO ADPRO REMOTE TRANSMITTERS
The Adpro models, FastScan, FastVu and FastTrace all
have unbalanced audio outputs. This drawing shows the
connections for these. A screened, single core microphone
cable should be used, although it is permissible to use one
core of a twisted pair as long it has an overall screen.
The trim control of the selected channel should be set to
minimum.
ENSURE THAT THE CHANNEL’S “PHANTOM” SWITCH
IS IN THE OFF POSITION (OUT).
CONNECTION TO AN UN-BALANCED MICROPHONE
An unbalanced (single-ended) microphone may be
connected to any of the input channels. A screened, single
core microphone cable should be used, although it is
permissible to use one core of a twisted pair as long it has
an overall screen. The trim control of the selected channel
should be set to a point where distortion is not present on
the channel.
ENSURE THAT THE CHANNEL’S “PHANTOM” SWITCH
IS IN THE OFF POSITION (OUT).
CONNECTION TO A BALANCED MICROPHONE
A balanced-line microphone may be connected to any of
the input channels. A single-pair or twin-core microphone
cable with overall screen should be used. If the microphone
is an electret condenser type which can utilise phantom
power, set the PHANTOM switch to ON (In) otherwise set it
to OFF.
ENSURE THAT THE CHANNEL’S “PHANTOM” SWITCH
IS IN THE OFF POSITION (OUT) WHEN USING
DYNAMIC TYPE BALANCED MICROPHONES.
CONNECTION TO AN UN-BALANCED SOURCE
An unbalanced (single-ended) audio source may be
connected to any of the input channels. A screened, single
core microphone cable should be used, although it is
permissible to use one core of a twisted pair as long it has
an overall screen. The trim control of the selected channel
should be set to a point where distortion is not present on
the channel.
ENSURE THAT THE CHANNEL’S “PHANTOM” SWITCH
IS IN THE OFF POSITION (OUT).
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 9 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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CONNECTING TO ADPRO FastScan, FastVu or FastTrace TRANSMITTERS.
ENSURE THAT THE CHANNEL’S “PHANTOM” SWITCH IS IN THE OFF POSITION (OUT).
If any ADPRO transmitter is connected to the amplifier’s input while the “Phantom” switch is set
to the ON position, the transmitter may suffer permanent damage or fail to operate correctly.
The audio output from the ADPRO transmitter should be taken from the 15 pin “D” type
connector marked “AUXILIARY I/O”, in the case of a FastScan transmitter, or “SWITCHER” in
case of a FastVu or FastTrace transmitter.
You MUST use a screened microphone type cable, connecting it to the XLR input connector as
shown in the diagram on the previous page.
The signal should be connected into INPUT 1 of the amplifier, and the “INPUT TRIM” control,
shown on the rear panel control drawing on page 6, should be set to minimum (fully anti-
clockwise).
Set the EQ controls for this channel as follows:-
“HIGH” Set to mid-way
“MID Set to mid-way
“LOW” Set fully anti-clockwise
The remaining inputs may be used for other audio sources (e.g. local microphones, Paging
systems etc).
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 10 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Installation of the Loudspeakers (Low Impedance Types)
We do not recommend the use of low impedance (4 or 8 Ohm) loudspeakers for high power
systems. It is far less convenient to add loudspeakers to a system, as the impedance always
needs to be between 4 and 8 Ohms. In order to achieve this, loudspeakers need to be added in
a carefully planned series and / or parallel configuration. Since the current required to drive low
impedance loudspeakers is considerably greater than that required for 70 Volt or 100 Volt line
loudspeakers, there is a much greater loss of power in the speaker cables, and this loss
increases considerably with distance.
We suggest that low impedance loudspeakers are only used where the distance between the
amplifier and the loudspeaker(s) is less than 15 metres. Heavy-duty speaker cable must be
used.
Installation of the Loudspeakers (High Impedance Types)
When you connect the loudspeakers, remove the power cord from the Mains AC outlet or inlet.
Connect loudspeakers in parallel (either star or daisy-chain). You can continue to connect high-
impedance speakers (70 or 100 Volt Line types) in parallel until the total power rating of all the
speakers added together equals the power output rating of the amplifier. Two examples are
shown below.
30W 10W 10W
10W
30W 30W 20W
15W
Exam
p
le
2
High Impedance
Speaker Terminals
In this example, the total power demand of the speakers is 95 Watts (30+30+15+20)
This would require an amplifier capable of delivering at least 120 Watts RMS power. In this
case the AVSP120 would deliver the required power and leave 25 Watts spare capacity.
Exam
p
le 1
High Impedance
S
p
eaker Terminals
In this example, the total power demand of the speakers is 60 Watts (30+10+10+10)
This would require an amplifier capable of delivering at least 60 Watts RMS power. In this case
the AVSP60 would deliver the required power but leave no spare capacity.
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 11 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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AVSP60 / AVSP120 BLOCK DIAGRAM
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 12 of 13

PUBLIC ADDRESS AMPLIFIER AVSP60/120 SERIES
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Specifications
AMPLIFIER SECTION
Rated Output Power (THD 1%)
AVSP60 60W (RMS)
AVSP120 120W (RMS)
Frequency Response 80Hz—20kHz
T.H.D (at 1 kHz Half Power Output) Less than 1%
S/N Ratio Better than 100dB
Input Sensitivity/Impedance
CH1 ~ CH6 1 mV~160mV/600Ω
Link In 100mV/15kΩ
Telephone In 775mV/600Ω
Amp In 1000mV/20kΩ
Speaker VOut/Impedance
AVSP 60 ( 60 Watt) 70V : 83Ω,100V : 165Ω
AVSP120 (120 Watt) 70V : 42Ω,100V : 83Ω
Pre Amp Vout/Impedance 1000mV/600Ω
Music On Hold Vout/Impedance 775mV/600Ω
Link Out Vout/Impedance 500mV/600Ω
Tone Control (100Hz, 10kHz) ±12dB
EQ Control (100Hz, 1kHz, 10kHz) ±12dB
GENERAL
Power Source AC 110V ~ 240V, 50/60 Hz
Power Consumption AVSP60 : 150W
AVSP120 : 300W
Weight AVSP60 : 11.4kg
AVSP120 : 13.5kg
Dimensions 420(W) x 132(H) x 360(D)mm
** Specifications and design subject to change without notice for improvements **
Document No. AVSP120-OEM01 REVISION 2.1 7th November 2005 Page 13 of 13