Toa A-901A User Manual

3 Low distortion and noise level
4 Excellent output regulation
5 Bass and treble controls on Input #1 and Program Input
6 Incorporated muting circuit
7 Self-protecting circuitry design
8 A full range of plug-in modules
9 Varied output impedances; 4 and 8 ohms, 25 and 70 volts
10 Clipping indicator
11 Compactness and lightweight
12 Portable or rack-mounting type
The TOA A-901A Mixer Power Amplifier controls and mixes up to
three independent input signals. Producing 10 watts of power, the
A-901A has ideal flexibility for small sound reinforcement systems.
Optional accessory modules are available for use with the A-901 A to
provide versatility for a wide range of operating applications. Edge
connectors on the rear of the unit permit the selection of TOA plug-
in modules : The H-01 series, H-02 series and H-03 series Micro-
phone Preamplifiers, the E-01 Mag. Phono Preamplifier, the X-01
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, the
I-01 Paging Input for combining with TOA Intercom Systems
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
1kHz sine wave for testing within the total system. Other features
include a muting function. Sources fed to Program Input and
Input 1 are simultaneously muted by short-circuiting at MUTE
TERMINAL on the rear. Accordingly, Input 2 can have priority.
The TOA A-901 A Mixer Power Amplifier has transformer-
isolated output terminals to match 4- or 8-ohm speaker systems, or
speaker distribution systems may be connected to the 25 or 70-volt
terminals.
The A-901 A can be rack mounted by using the MB-920 Rack-
mounting Bracket Accessory.
TOA Corporation
133-02-735-OA
Printed in Japan
2 Wide frequency response; 20 — 20,000 Hz, ±1dB
1 3-channel mixer power amplifier
TOA NEW 900 SERIES
MIXER POWER AMPLIFIER
Operation Instruction Manual
A-901A
General DescriptionFeatures

Toa A-901A Specifications

Power

output power	10 watts RMS
power consumption	30 watts
voltage	AC 120 volts, 60 Hz

Operating Environment

temperature range	-10°C to +60°C (12°F to 140°F)
frequency response	20—20, 000 Hz, ± 1 dB
signal-to-noise ratio	82 dB

Weight and Dimensions

height	3.98" (101 mm)
width	9.84" (250 mm)
depth	9.65" (245 mm)
weight	8.6 lbs (3.9 kg)