Toa A-503A Specifications

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THE TOA 500 SERIES
MIXER/POWER AMPLIFIERS are
ideal for a wide variety of
installed sound applications.
Engineered with proven TOA
quality and reliability, the 500
Series is simple to install and oper-
ate, saving you time and money.
The A-503A (30 W), A-506A (60 W),
and A-512A (120 W) Mixer/
Amplifiers each have six input
channels to accommodate a variety
of input sources and a built-in
power amplifier with transformer-
isolated 25 V, 70 V and 4 ohm
speaker outputs.
Pre-Out/Power-In jacks allow con-
nection of external signal processing
between the mixer and amplifier
sections. Other features include
booster and tape outputs for con-
necting an external mixer, amplifier
or recording device. A convenient
+24 VDC input allows operation in
remote applications.
The TOA 500 Series are UL and
cUL Listed and carry a five year
warranty.
H
I G H L I G H T S
Integrated Six Channel Mixer/
Amplifiers for paging, music distribu-
tion and messaging-on-hold.
Proven TOA Quality and Reliability
Engineered for High Performance with
wide frequency response, very low
noise and distortion, and excellent
output regulation.
Three Models:
A-503A (30 W), A-506A (60 W),
A-512A (120 W)
25 V, 70 V and 4 Ohm Transformer-
Isolated Speaker Outputs with screw
terminal connector and protective
cover plate.
Two Low Impedance Microphone
Inputs, balanced, transformer-isolated
with XLR-F connectors and switchable
phantom power.
Three Auxiliary Line Inputs, unbal-
anced with RCA connectors
Hi-Z Mic/Phono Input (switchable),
unbalanced with RCA/screw terminal
connectors
Optional Module converts Inputs 3 & 4
to low impedance microphone inputs
with XLR-F connectors.
O A
P T I O N A L C C E S S O R I E S
MB-21B2 Rack-mount Kit
PF-511 Perforated Rack Panel (2 RU)
U-51 Dual Lo-Z Mic Input Module
U-52 Unbalanced-to-Balanced Transformer (600:600 ohms)
External Mute Terminals for switch
closure override of Inputs 3-5 with
adjustable mute depth.
Individual Channel and Master Volume
Controls
Remote Mic Volume Terminals
(Input 2) for control with an external
10k ohm linear-taper potentiometer.
Bass/Treble Tone Controls
Insert Jacks for connecting external
signal processor.
Booster and Tape Outputs for connect-
ing external mixer, amplifier or record-
ing device.
+24 VDC Input for connection to exter-
nal power source.
Rear Panel AC Convenience Outlet for
powering external equipment.
Over-current and Thermal Protection
Circuitry prevents potential damage
from overload, short-circuit and over-
heating.
Optional Rack-Mount Kit
UL / cUL Listed
Five Year Warranty