900 Series Modular Amplifiers

Modular Design Advantages

Design Flexibility One Product for Many Applications Easy to Upgrade Easy to Repair and Service TOA Reliability

A-900 Series Mixer/Amplifiers

30, 60 and 120 Watt Models

Eight Module Slots

Dual Mute Buses

Remote Master Volume

Bass/Treble Controls

25/70 V and 4/8 Ohm Speaker Outputs

Auxiliary Output

Bridge In/Out

Pre-Out/Power In

Protection Circuitry

900 Series Modules

Module Categories

Mic Typically from 0.25 mV (-70 dBu) to 2.5 mV (-50 dBu) Examples include: microphones, wireless microphone

receivers Line

Typically from 100 mV (-18 dBu) to 7.75 V (+20 dBu) Examples include: AM/FM tuners, CD players,

cassette decks, computer sound cards, jukeboxes, satellite receivers, signal processors, telephone page outputs, wireless microphone receivers

Special Function

Mic Modules

Low-Impedance Phantom Power Hi/Low Cut Filters Types

Standard Mute-Send Mute-Receive Voice Gate Compressor Remote Volume

Line Modules

Standard Hi/Low Cut Filters Balanced w/ Transformer-Isolation

10k ohms or 600 ohms Unbalanced

Dual RCA jacks (stereo sum) Mute-Send Mute-Receive Remote Volume Control Compressor

Special Function

Line Output Balanced, Transformer-Isolated, Level Control

Line Input w/ MOH Output Mute-Receive

Tone Generators 1k Hz Sine Wave Buzzer/Yelp Switch-Selectable Chime Message Repeater

Speaker Processors F-122CU, H Series

Module Model Numbers

Module Connector Types

F M P R R S* S S

*All “S ” type modules with 3--screw terminal connectors will change to Removable Terminal Block (Phoenix-style) in 2004.

900 Muting Modules

Mute Send Activates the Mute function of Mute-Receive

modules Mute-Receive

Responds to Mute activation from Mute-Send modules or switch closure

Both types connect to Mute Bus #1 and #2

Module Edge Connector

Mute Bus Architecture

Mute Bus

Rear Panel Screw Terminal

Module Ch 1

Module Ch 2

Module Ch 3

Etc.

Dual Mute Buses

Module Ch 1

Etc.

Mute Buses#1 #2

Rear Panel Screw Terminals

Mute 1

Mute 2

A-900MK2 Rear Panel View

Mute 2

GND

Mute 1

Speaker Processor Modules

Speaker Processor Modules

900 Series Module Guide

M-900MK2Mixer/Pre-amplifier

Eight Module Slots Dual Mute Buses Remote Master Volume Bass/Treble Controls Balanced, Transformer-

Isolated Outputs Auxiliary Output Bridge In/Out

P-900MK2 SeriesPower Amplifiers

60, 120 and 240 Watt Models

One Module Slot Direct Input 25/70 V and 4/8 Ohm

Speaker Outputs Protection Circuitry

900 Series In-Wall Mixer/Amplifiers

60 and 120 Watt Models

Six Module Slots (Expandable To Eight)

One Mute Bus

Graphic EQ

Compressor

25/70 V and 4/8 Ohm Speaker Outputs

Bridge In/Out

Protection Circuitry

Flush or Surface-Mount

900 Series Applications

Paging Over a Music Source

Telephone Paging and Music-On-Hold

Mute-Send/Receive Combination