IN-WALL AMPLIFIER W-906A/912A TOA 900 SERIES (60-WATT)

IN-WALL AMPLIFIER W-906A/912A TOA 900 SERIES (60-WATT)
TOA 900 SERIES
IN-WALL AMPLIFIER
W-906A/912A
(60-WATT)
(120-WATT)
Features
1. 6-channel mixer power amplifier
2. Expandable to 8-input
3. Output power: 120W for W-912A, 60W for W-906A
4. Wide frequency response: 30 to 20,000Hz ±1dB
5. Low distortion and noise
6. Excellent output regulation
7. Built-in one-octave equalizer
8. Built-in compressor
9. Self-protection circuitry design
10. Separate output terminals: 4 and 8 ohms, 25 and
70 volts
11. Extra space for customizing
12. LED pilot light
13. LED peak indicator
14. Full range of plug-in modules
15. Flush and surface mounting
Description
The TOA W-906A and W-912A Mixer Power Amplifiers control
and mix up to six independent input signals plus two inputs
with use of an expanding kit WE-2. The W-906A delivers up to
60 watts of output power and the W-912A 120 watts. Twenty
one optional accessory modules are available to allow the
W-906A and W-912A amplifiers to be configured for a variety of
applications. Edge connectors on the rear of the units permit
TOA modules to be easily inserted for use.
Modules include the M Series microphone preamplifiers,
available with muting, remote volume control, voice gate and
compressor options. The U Series auxiliary preamplifiers,
available with muting, remote volume control and compressor
options. The B Series bridging transformers, available with
muting option, the L Series line matching transformers,
available with muting option, the S Series signal generator
modules and the I-01S Exes interface paging module. Also
available are the T-01S module featuring 600-ohm balanced
output capability and the T-02S module featuring auxiliary input
and balanced line output for music-on-hold.
For detailed module specifications, please refer to publication
TOA 900 Series Module Specifications, Features and
Connector Chart.
The W-906A and W-912A Mixer Power Amplifiers have a built-in
one-octave graphic equalizer with 9 bands to tailor sound
system frequency response to room acoustics, reducing
feedback tendencies and improving intelligibility. A built-in
compressor circuit is provided to protect the output level from
distortion as a result of excessive input and keep it constant.
The compressor’s threshold level can be adjusted. The W-906A
and W-912A Mixer Power Amplifiers have output terminals to
match 4- or 8-ohm speaker systems, or a speaker distribution
system may be connected to the 25 or 70-volt terminals. User’s
(blank) space is provided for additional functions to be made
by the customers. The expanding kit (optional) may be loaded
in this space when the number of inputs is increased.
Protection against tampering is assured by means of a keylocked hinged door. The W-906A and W-912A can be
mounted in any four-inch wall with use of the BX-9F Flush
Mounting Back Box. Wall mounting is also possible with use of
the BX-9S Surface Mounting Box.
Specifications
Note: (D): Direct output (T) Transformer output
Model
Type
Output Power
Power Bandwidth
Frequency Response
Total Harmonic Distortion
W-912A
W-906A
In-Wall mounting 6-channel
mixer power amplifier
120W RMS
60W RMS
(D): 20—20,000Hz. 0.5% THD
(T): 50—20,000Hz, 0.5% THD
(D): 30—20,000Hz ±1dB, (T): 30—15,000Hz ±1dB, (T): 30-20,000Hz +1dB, -2dB
0.02% at 1 kHz, rated output
Si X input ports: Each port accepts any input module except T-01S.
(Use T-01S only in port #5 or #6.)
One bridging input/output
Inputs
Input Sensitivity/Impedance
Outputs
Output Regulation (1kHZ)
Signal-to-Noise Ratio
(Band Pass: 20-20,000 Hz)
Input ports #1 to #6: 100mV/10k ohms,
Bridging input/output 100mV/3.3k ohms
(D): 4 ohms, unbalanced
(T): 8 ohms, 25V & 70V balanced
(T): Less than 1.0dB, no load to full load
(D): Less than 0.5dB, no load to full load
88dB
Equalizer IN:
Compressor IN: 84dB
Controls OFF:
90dB
Master volume Max.: 77dB
Compression
Attack time: no greater than 2 milliseconds
Release time: variable 20 msec to 2 sec.
Equalization
9-band one-octave graphic equalizer
Center frequencies: ISO 63, 125, 250, 500, lk, 2k, 4k, 8k, 16k Hz
Equalization range: ±12dB
Filters
High-pass filter: 180Hz 12dB/octave
6
1
1
9
1
Controls
Indicators
Protection Circuitry
1 LED power indicator
Power Consumption
1 LED peak indicator
AC 120V, 60Hz, 180W
AC 120V, 60Hz, 100W
Effective space for customizing 4"(W) x 2-3/8"(H) x 3-3/4"(D)
Optional expanding kit WE-2 may be loaded
User’s Space (Blank Panel)
Dimensions
Weight (without input modules and back box)
Color
Standard Accessories
Associated Equipment
Equalization ON/OFF switch
High-pass filter ON/OFF switch
Low-pass filter ON/OFF switch
Low-cut switch
(60Hz, 6dB/octave, inside)
Built-in with 2 AC fuses (1 inside) and 1 output circuitry
Output circuitry protection when heatsink temperature overheats
Screw-terminal strip
Mute
Input #1 to #6: Card-edge connector
AC power cord SJT 3-conductor
Screw-terminal strip
Output:
Bridging input/output: Screw-terminal strip
Connectors
Other Features
Low-pass filter: 7kHz 12dB/octave
1
1
1
1
Input gain controls
Master gain control
Compression level control
Equalizer controls
Power ON/OFF switch
Compression range: 30dB
less than 1%
Distortion:
Face panel: 26-3/4"(H) x 16-1/4"(W) x 1-1/8"(0) (680 x 412 x 28 mm)
30.20 Ibs (13.7kg)
38.14 lbs. (17.3kg)
Silver
3 Volume control covers
Output disconnect for approx. 5 sec. after power turned on
U-11S, U-12S, B-11S, L-11S, M-11S, L-41S
Muting Function: provided for modules
Plug-in modules (see module specifications)
Volume control cover..............................YA-910
Expanding
kit.............................................WE-2
*Power Bandwidth and Frequency Response are from input port to power amplifier output. *Specifications are subject to change without notice.
Controls and Functions
Architect’s and Engineer’s Specifications
Output Equalizer Characteristics
The In-Wall Amplifiers shall be capable of controlling and mixing up to 6
independent input signals plus 2 inputs with the use of an expanding kit.
The amplifiers shall deliver up to 60W or 120W of output power. The TOA
plug-in accessory modules designed for use with the W-906A and W-912A
In-Wall Amplifiers shall utilize the latest in surface mount component
technology and include the following modules: the M Series microphone
preamplifiers available with muting, remote volume control, voice gate and
compressor options, the U Series auxiliary preamplifiers available with
muting, remote volume control and compressor options. The B Series
bridging transformers, available with muting option, the L Series line
matching transformers, available with muting option, the S Series signal
generator modules and the I-01S Exes interface paging module. Also
available shall be the T-01S module featuring 600-ohm balanced output
capability and the T-02S module featuring auxiliary input and balanced line
output for music-on-hold.
The In-Wall Amplifiers shall have a built-in 1-octave graphic equalizer with
9 bands to tailor sound system frequency response to room acoustics,
reducing feedback tendencies and improving intelligibility. A built-in compressor circuit shall be provided to protect output level from distortion as
a result of excessive input and keep it constant. The compressor’s
threshold level shall be able to be adjusted.
The In-Wall Amplifiers shall have output terminals to match 4- or 8-ohm
speaker systems, and shall allow a speaker distribution system to be
connected to the 25- or 70-volt terminals.
A user’s blank space shall be provided for additional functions chosen by
the user. This space shall accept an expanding kit (optional) when the
number of inputs is increased. A key-locked door shall be provided to
assure protection against tampering. The In-Wall Amplifiers shall be able
to be mounted in any 4-inch wall with use of the BX-9F flush mounting
back box. Wall mounting shall also be possible by using the BX-9S
surface mounting box. The In-Wall Amplifiers shall be TOA models W-906A
and W-912A.
Frequency Response
at 1/10 rated output (Direct output: 4-ohm load,
Transformer output: 70V line)
Power Output vs Frequency
at 0.5% THD (Direct output: 4-ohm load,
Transformer output: 70V line)
*NOTE 1: THE T-01S MODULE WILL ONLY FUNCTION IN PORTS 5
AND 6 OF THE FOLLOWING MODELS: A-903A, A-906A, A-912A,
M-900A, W-906A AND W-912A.
*NOTE 2: W-906A AND W-912A IN-WALL AMPLIFIERS REQUIRE
MODULES WITH SCREW TERMINALS.
Optional Back Box
BX-9F
Back Box for
flushmounting
Weight:
12.35 Ibs. (56kg)
BX-9S
Back Box for
surface mounting
Weight:
16.09 Ibs. (7.3kg)
Printed by QQ Printing 3/97
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