Toa A-912MK2 User Manual

900 series
MIXER POWER AMPLIFIERS
A-903MK2
A-906MK2
A-912MK2
9
00
SERIES
AMPL
IFIER
A
–
903
MK
2
T
O
N
E
D
E
F
E
A
T
OFF
ON
L
O
W
C
U
T
OFF ON
S
I
G
N
A
L
N
O
R
M
A
L
PR
O
T
E
CT
O
N
OF
F
P
E
A
K
P
O
W
E
R
M
A
S
T
ER
IN
P
U
T
8
IN
P
U
T
7
IN
P
U
T 6
IN
P
U
T
5
I
N
P
U
T
4
IN
P
U
T
3
IN
P
U
T
2
T
R
E
B
L
E
IN
P
U
T
1
B
A
S
S
OPERATING INSTRUCTIONS
Thank you for purchasing TOA's 900 Series Mixer Power Amplifier.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
This figure represents the A-903MK2.
TABLE OF CONTENTS
1. IMPORTANT SAFETY INSTRUCTIONS ..... 2
2. SAFETY PRECAUTIONS ............................ 3
3. GENERAL DESCRIPTION .......................... 5
4. FEATURES .................................................. 5
5. NOMENCLATURE AND FUNCTIONS ........ 6
6. INSTALLATION AND CONNECTIONS
6.1. Module Installation ................................ 8
6.2. Speaker Connections ............................ 9
6.3. Remote Control Connections .............. 11
7.
RACK MOUNTING BRACKET ATTACHMENT ... 12
8. OPERATION .............................................. 13
9. VOLUME CONTROL COVER ................... 13
10. DIMENSIONAL DIAGRAMS
10.1. A-903MK2 ......................................... 14
10.2. A-906MK2, A-912MK2 ...................... 14
11. SPECIFICATIONS
11.1. A-903MK2 ......................................... 15
11.2. A-906MK2, A-912MK2 ...................... 16

Toa A-912MK2 Specifications

General

Tone Control	Bass, Treble
Indicator	Power LED
Output Impedance	8 Ω
Output Power	120 W
Power Source	AC 120 V, 60 Hz
Rated Output	120 W
Input	MIC
Output	Speaker terminal (8Ω)
S/N Ratio	60 dB or more
Control	Volume, Tone, Power
Operating Temperature	0°C to +40°C
Finish	Black
Dimensions	420 mm
Power Supply	AC 100V, 50/60Hz

Summary

Important Safety Instructions

Safety Precautions

Installation Safety Precautions

Safety guidelines for installing the unit, including warnings about water and heat.

Operational Safety Precautions

Safety guidelines for operating the unit, covering power, cords, and ventilation.

General Description

Product Features

Nomenclature and Functions

Front Panel Nomenclature

Details of front panel controls, indicators, and their functions.

Rear Panel Nomenclature

Details of rear panel connectors, terminals, and their functions.

Installation and Connections

Module Installation

Instructions for selecting and installing plug-in modules into the amplifier.

Speaker Connections

Guide for connecting speakers to transformer-balanced and unbalanced outputs.

Remote Control Connections

Details on connecting remote volume and mute controls.

Rack Mounting Bracket Attachment

Operation Guide

Volume Control Cover

Dimensional Diagrams

A-903MK2 Dimensions

Physical dimensions and measurements for the A-903MK2 model.

A-906MK2, A-912MK2 Dimensions

Physical dimensions and measurements for A-906MK2 and A-912MK2 models.

Product Specifications

A-903MK2 Specifications

Detailed technical specifications for the A-903MK2 mixer power amplifier.

A-906MK2, A-912MK2 Specifications

Detailed technical specifications for A-906MK2 and A-912MK2 mixer power amplifiers.