900 Series Modular Amplifiers

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900 Series Modular Amplifiers
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Modular Design Advantages

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

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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

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900 Series Modules
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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

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Mic Modules

• Low-Impedance
• Phantom Power
• Hi/Low Cut Filters
• Types
• Standard
• Mute-Send
• Mute-Receive
• Voice Gate
• Compressor
• Remote Volume

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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

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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

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Module Model Numbers
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Module Connector Types
All S type modules with 3--screw terminal
connectors will change to Removable Terminal
Block (Phoenix-style) in 2004.
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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

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Module Edge Connector
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Mute Bus Architecture
Mute Bus
Rear Panel Screw Terminal
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Dual Mute Buses
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A-900MK2 Rear Panel View
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Speaker Processor Modules
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Speaker Processor Modules
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900 Series Module Guide
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A-901A Mixer/Amplifier

• 10 Watts
• Two Module Slots
• One Mute Bus
• Bass/Treble Controls
• 25 V, 70 V and 4/8 Ohm Speaker Outputs
• Auxiliary Input
• Protection Circuitry

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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

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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

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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

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900 Series Applications
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Paging Over a Music Source
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Telephone Paging and Music-On-Hold
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School Gym Sound System
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Mute-Send/Receive Combination