Front Panel Controls And Features; Block Diagram - Toa A-903A Operating Instructions Manual

TOA NEW 900 SERIES

Front Panel Controls and Features

A-903A
Item
1
2
3
4
5
6
7

Block Diagram

Name
POWER ON-OFF Applies line power. Two-position push button
SWITCH switch for on-off modes.
Indicates the output level of the amplifier. At rated
METER
output, it shows 0 VU (at continuous sine-wave
signal input).
When power is turned on, meter illuminates.
INPUT VOLUME Adjust gain of INPUT #1 – #6 respectively.
CONTROLS
BASS CONTROL
Adjusts bass response.
Turn clockwise (CW) to boost and counterclockwise
(CCW) to attenuate the bass response. Tone is flat
at center.
TREBLE CONTROL Adjusts treble response.
Turn CW to boost and CCW to attenuate the treble
response. Tone is flat at center.
TONE SWITCH Selects IN/DEFEAT of the BASS and T R E B L E
Controls. When this button is depressed (
BASS and TREBLE Controls are active. (IN)
When pressed again (
make tone flat. (TONE DEFEAT)
Adjusts overall gain of unit.
MASTER VOLUME
CONTROL
A-906A, A-912A
Function/Description
), they become inactive to
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), the