Toa M-900MK2 User Manual

TOA 900 SERIES II
MIXER PREAMPLIFIER
Operating Instructions
M-900MK2
THE LIGHTNING FLASH WITH
ARROWHEAD WITHIN A TRIANGLE IS
INTENDED TO TELL THE USER THAT
PARTS INSIDE THE PRODUCT ARE A
RISK OF ELECTRIC SHOCK TO
PERSONS.
THE EXCLAMATION POINT WITHIN A
TRIANGLE IS INTENDED TO TELL
THE USER THAT IMPORTANT
OPERATING AND SERVICING
INSTRUCTIONS ARE IN THE PAPERS
WITH THE APPLIANCE.
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
TOA Corporation
TO REDUCE THE RISK OF ELECTRICAL
SHOCK, DO NOT REMOVE COVER.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.

Toa M-900MK2 Specifications

General

Finish	Black
Type	Mixer Amplifier
Power Source	AC 120 V, 60 Hz
Total Harmonic Distortion	0.5% or less
Total Harmonic Distortion (1kHz, rated output)	0.1%
Signal-to-Noise Ratio	100dB or more
Signal-to-Noise Ratio (A-weighted)	100dB or more
S/N Ratio	100dB or more
Input Impedance	Mic: 600Ω, Line: 10kΩ
Tone Control	Bass: ±10dB at 100Hz, Treble: ±10dB at 10kHz
Operating Temperature	-10°C to +40°C
Cooling	Natural air cooling
Protection	Overcurrent protection, Thermal protection

Summary

General Description and Features

Product Features Overview

Lists key features like 8-channel mixing, wide frequency response, low distortion, and module compatibility.

Nomenclature - Front Panel

Front Panel Controls and Indicators

Identifies and explains the function of all buttons, knobs, and LEDs on the front panel.

Nomenclature - Rear Panel

Rear Panel Connectors and Ports

Details the various input/output terminals, AC outlet, and module ports on the rear panel.

Input and Output Connections

Module Input Ports

Describes the procedure for inserting plug-in modules into the eight input ports.

Output Terminal Connections

Explains the 600-ohm and 150-ohm output connections for amplifiers and the AUX Out.

Operational Connections

Muting and Remote Volume Control

Details how to connect for muting functions and remote master volume control.

Installation - Rack Mounting

Rack Mounting Procedure

Explains how to mount the unit in a 19" equipment rack using optional brackets.

Operation and Installation

Basic Operation

Covers powering on, volume adjustment, and tone control settings for normal use.

Installation Precautions

Advises on suitable environments and critical safety warnings regarding electric shock.

Servicing Information

Unpacking and Failure Handling

Guides on inspecting for shipping damage and contacting service for failures.

Technical Specifications

Unit Specifications

Lists detailed technical data including type, output, frequency response, THD, and input/output impedance.

Controls, Indicators, and Power

Details the unit's controls, indicators, protection, connectors, power consumption, and temperature range.

Appearance and Dimensions

Unit Views and Measurements

Presents front, rear, top, and side views with key dimensions for physical reference.