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Operation Instruction Manual
T O A NEW 900 SERIES
POWER AMPLIFIER
P912A
2 Low distortion and noise level
3 Excellent output regulation
4 A full range of plug-in modules
5 Self-protecting circuitry design
6 Varied output impedances; 4 and 8 ohms, 25 and 70 volts
7 Input level switch (selectable 1,000mV/100mV)
8 Portable or rack-mounting type
The TOA P-906A and P-912A Power Amplifiers deliver up to 60
watts and 120 watts of power
respectively
at
less
than 0.5%
total
harmonic distortion (THD) from 20 to 20,000 Hz (transformerless
4-ohm output). The P-906A and P-912A have a high-impedance
direct input and an input port (edge connector) to accept one
module accessory. Module selection is determined by application
among the TOA plug-in modules:
The H-01 series, H-02 series and H-03 series Microphone Pre-
amplifiers, E-01 Mag. Phono Preamplifier, the X-01 series Auxiliary
Preamplifiers for high-level sources, the B-01 series Bridging Trans-
formers for bridging high-impedance lines, the L-01 series Line
Matching Transformers for matching 600-ohm lines, 1-01 Paging
Input for combining with the TOA Intercom System EXES-1000,
EXES-5000 and EX-16, and the S-01, S-02 and S-03 Tone signal
generators for generating attention-getting signals and 1 kHz sine
wave for testing within the total system.
The P-906A and P-912A have a low-cut switch for a cutoff frequency
of 60 Hz, and an input-level switch for input sensitivity of 1V
(0dBv) or 100mV (—20dBv). Output terminals provide connections
for 4-ohm and 8-ohm speakers, plus 25-volt and 70-volt speaker dis-
tribution outlets.
With plug-in modules, the TOA P-906A and P-912A Power Am-
plifiers may be used as a pre/power amplifier.
The P-906A and P-912A can be rack mounted by using the MB-931
Rack-mounting Bracket accessory. The PF-911 Perforated Panel
(1.73 inches, 1 rack unit) accessory provides suitable ventilation,
finished in color to match the P-906A and P-912A.
133-02-740-6
Printed in Japan
Toa Electric Co., Ltd.
KOBE, JAPAN
Features
General Descriptions
P906A
1 Wide frequency response; 20 — 20,000 Hz, ±1dB