Toa w 906a and w 912a wall amplifier

Page 1

TDA NEW 900 SERIES
IN-WALL

MIXER POWER AMPLIFIER

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6-chennel mixer power amplifier

Expandable to B-input

Output power: 120W for W-912A, SW for W-BOSA
Wide frequency response: 30 to 20,000l-lz 1 B
Low distortion and noise

Excellent output regulation

Bu -in one-octave equalizer

Bui in compressor

Self-protection circuitry design

10 Sop-rm output terminals: 4 and 8 ohms, 25 end 70 volts
11 Extra space for customizing

12 LED pilot light

13 LED peek indicator

14 Full range of plug-in modules

15 Flush and surface mounting

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E- TOA Toa Electric Co. Ltd.

KOBE. JAPAN

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The TOA W-QOSA and W~912A Mixer Power Amplifiers control and
mix up to six independent input signals plus two inputs with use of
expanding kit. The W-906A delivers up to 80 watts of output power
and the W-912A 120 watts.OptionaI accessory modules are available
for use with the WSOGA and W-912A to provide versatility for a
wide range of operating applications. Edge connectors at the bottom
oi the front panel permit the selection of the TDA plug-in modules:
The H01 series, H02 series, H-03 series, H<21 end H-22 Microphone
Preemplitiers, the 801 series and E41 series Mag. Phono Preampli.
liars, the X-01 series, X series and X21 Auxiliary Preamplifiers
for high-level sources, the 8-01 series and B-Il series Bridging Trans~
formers for bridging high-impedance lines, the L01 series Line
Matching Transformers for matching Soc-ohm lines, l-OI Paging
Input for combining with TOA Intercom Systems EXESJOOO,
EXES-SOOO and EX-le, T-O'i series Line Outputs for matching
GOO-ohm lines and the 8-01, 502 and 503 Tone Signal Generators
for generating attentionoetting signals and l KHz sine wave for
testing within the total system. Other ieetures include a muting
function. Sources fed to particular Input module accessories are
muted by shortcircuiting at MUTE TERMINALS on the front. To
perform this iunction, Module E-li, X-1'l series or 3-11 series is
required. Using any of the modules H-Zl, H-22 end X-Zl permits
the input signal level to be controlled remotely by means of an
external potentiometer.

The WBOGA and W-912A have a built'in one-octave graphic equalizer
with 9 bands to tailor sound system frequency response to room
acoustics, reducing feed-beck tendencies and improving intelligibility.
A buiot-in compressor circuit is provided to protect the output level
from distortion as a result of excessive input and keeps it constant.
Compressors threshold level can be adjusted.

The WdQOGA and W-912A Mixer Power Amplifiers have output
terminals to match 4- or Sohm speaker systems, or speaker
distribution system may be connected to the 25 or 70-volt terminals.
User's (blanklspece is provided for additional functions to be made
by the customers. The expanding kit (option) may be loaded in this
space when the number of input is increased. Protection against
tampering ls assured by means of a key-locked hinged door. The
WsQOGA and W-912A can be mounted in any four-inch wall with
of the BX-SF Flush Mounting Back Box. 00-well mounting is also
possible with the BX-SS Surface Mounting Box.

33-01-738-9
Printed in lelrl