Operation Instruction Manual
TOA 900 SERIES
POWER AMPLIFIER
P-924A
1 Wide
frequency
response; 20 — 20,000 Hz, ±1dB
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-924A Power Amplifier delivers up to 240 watts of power
at less than 0.5% total harmonic distortion (THD) from 20 to
20,000 Hz (transformerless 4-ohm output). The P-924A has 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 M-01 series, M-03 series, M-51 series and M-61 series Micro-
phone Preamplifiers, R-01 Mag. Phono Preamplifier, the U-01 series,
U-21 series and U-61 series Auxiliary Preamplifiers for high-level
sources, the B-01 series Bridging Transformers for bridging high-
impedance lines, the L-01 series Line Matching Transformers for
matching 600-ohm lines, 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-924A has a low-cut switch for 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 distribution
outlets.
With plug-in modules, the TOA P-924A Power Amplifier may be
used as a pre/power amplifier.
The P-924A can be rack mounted by using the MB-931A 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-924A.
1 3 3 - 0 2 - 9 0 7 - 7 0
Printed in Japan
Toa Electric Co., Ltd.
KOBE, JAPAN
Features
General Descriptions