TOA a-503a 補足マニュアル

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TOA Electronics Amplifier Guide

10 WATT 3-CHANNEL MIXER/AMPLIFIER
• Modular design allows fast and easy custom

configurations for unmatched flexibility

• Two module slots accept TOA plug-in modules 
• Program input for unbalanced line-level source
• 25 V, 70.7 V and 4 / 8 ohm speaker outputs
• Muting function for priority paging over back-

ground music

• Bass and treble controls for program input
• Optional rack-mount kit, model MB-920 (2 RU)
• Five year warranty

8-CHANNEL MODULAR MIXER
• Modular design allows fast and easy custom config-

urations for unmatched flexibility

• Eight module slots accept any combination of TOA

plug-in modules

• Balanced, transformer-isolated output with selectable

impedance, screw terminal connector and protective
cover plate

• Dual mute bus permits multiple levels of paging

priority using optional mute-type modules

• Remote master volume terminals for control with

an external 10k ohm linear-taper potentiometer

• Auxiliary output for connecting an external mixer or

recording device

• Bridging input/output for input expansion or system

combining

• Protection circuitry prevents potential damage from

overload, short-circuit or over-heating

• Five year warranty

30/60/120 WATT 8-CHANNEL MIXER/AMPLIFIERS
• Modular design allows fast and easy custom

configurations for unmatched flexibility

• Eight module slots accept any combination of

TOA plug-in modules

• 25 V, 70.7 V and 4 / 8 ohm speaker outputs
• Dual mute bus permits multiple levels of paging

priority using optional mute-type modules

• Remote master volume terminals for control

with an external 10k ohm linear-taper poten-
tiometer

• Low cut switch to limit low frequency response
• Auxiliary output for connecting an external

mixer or recording device

• Insert jacks for connecting external signal 

processing

• Bridging input/output for input expansion or

system combining

• Protection circuitry prevents potential damage

from overload, short-circuit and over-heating

• Five year warranty

60/120/240 WATT POWER AMPLIFIERS
• Modular single-channel power amplifiers
• Input module slot accepts most TOA plug-in modules

for custom system configurations

• 25 V, 70.7 V and 4 / 8 ohm speaker outputs
• Direct input for connecting an external mixer or other

source

• Selectable input sensitivity to accommodate high or low

input levels

• Low cut switch to limit low frequency response
• Protection circuitry prevents potential damage from

overload, short-circuit, or over-heating

• Five year warranty