TOA a-503a 補足マニュアル

60/120/240 WATT 9-CHANNEL MIXER/AMPLIFIERS
• Flexible mixer/amplifiers for sound reinforcement, paging and background/foreground music distribution
• Six switchable Mic/Line inputs, balanced, with mic trim and switchable 24 VDC phantom power
• Two auxiliary inputs, unbalanced, with dual-RCA jacks
• 900 series module slot accepts 900 series plug-in modules for custom system configurations
• 25 V, 70.7 V and 4 ohm speaker outputs
• Transformer isolation for telephone paging (Input #1)
• User configurable auto-mute function with sensitivity adjustment
• Five-segment LED power meter
• Remote master volume (via 10k ohm pot) and remote turn-on
• Insert jacks for connecting external signal processor
• Protection circuitry prevents potential damage from overloads, short-circuit and overheating
• Five year warranty

TOA Electronics Amplifier Guide

15/30/60/120 WATT 5-CHANNEL MIXER/AMPLIFIERS
• Compact, flexible mixer/amplifiers for paging,

background/foreground music distribution and
music/messaging-on-hold

• 900 series module slot with Page/BGM switch

accepts most 900 series plug-in modules for custom
system configurations

• 25 V, 70.7 V and 4 / 8 ohm speaker outputs
• Microphone page input, balanced, with 24 VDC

phantom power

• Telephone page input, balanced, transformer-

isolated with switchable 600/10k ohm input
impedance

• Program input, balanced, with screw terminal 

connector

• Auxiliary input, unbalanced, with dual-RCA jacks

for convenient connection of stereo sources

• Music-on-hold (MOH) outputs, 600 ohm balanced

0 dBV, and 8 ohm / 1 watt

• Selectable muting modes for versatile priority

paging configurations

• Insert jacks for connecting external signal processor
• Protection circuitry prevents potential damage

from overloads, short-circuit and overheating

• Five year warranty

15/30 WATT 3-CHANNEL MIXER/AMPLIFIERS
• Compactmixer/amplifiers for paging, background/

foreground music distribution and music/messaging-
on-hold

• 25 V, 70.7 V and 4 / 8 ohm speaker outputs
• Microphone/telephone paging input (switchable), bal-

anced, transformer-isolated, with switchable 600/10k ohm
input impedance

• Program (PGM) input, balanced, screw-terminal connector
• Auxiliary (AUX) input, stereo-summing dual-RCA jacks
• Music-on-hold (MOH) output adjustable from line-level

to 1 W at 8 ohms

• Auto-mute function allows voice-activated paging over-

ride of AUX/PGM without interrupting the MOH output

• Protection circuitry prevents potential damage from

overloads, short-circuit and over-heating

• Five year warranty

18