TOA

900 Series 30W Modular Mixer/Amplifier

Brand: TOA
Model: A-903MK2 UL
Products Variants:
25 V, 70 V and 8 Ohm Transformer-Isolated Speaker Outputs with screw terminal connector and protective cover plate (A-903MK2: 4 ohm)
Auxiliary Output for connecting an external mixer or recording device
Bass/Treble Tone Controls with tone defeat switch
Bridging Input/Output for input expansion or recording device
Direct Low-Impedance Output Mode bypasses output transformer
Dual Mute Bus permits multiple levels of paging priority using optional mute-type modules
Eight Module Slots accept any combination of TOA plug-in modules for custom system configurations
Engineered for high performance with wide frequency response, very low noise and distortion, and excellent output regulation
External Mute Terminals for activating mute function with external switch closure
Five year warranty
Individual Channel and Master Volume Controls
Insert Jacks for connecting external signal processing
Low Cut Switch to limit low frequency response
Modular Eight Channel Mixer/Amplifiers for paging, background/foreground music distribution and music/messaging-on-hold
Normal, Clip, Power, Protect, and Signal Indicators provide unit status
Optional Rack-Mount Kit, MB-25B
Over-current and Thermal Protection Circuitry prevents potential damage from overload, short-circuit and overheating
Proven TOA Quality and Reliability
Rear Panel AC Convenience Outlet for powering external equipment
Remote Master Volume Terminals for control with an external 10k ohm linear-taper potentiometer
Turn-On Delay disconnects output during power-up
UL / cUL Listed
Volume Control Security Knobs Included (4)
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Specification Sheet Specification Sheet
Specification Sheet (Download)

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Product Properties

  • Bullet points
  • 25 V, 70 V and 8 Ohm Transformer-Isolated Speaker Outputs with screw terminal connector and protective cover plate (A-903MK2: 4 ohm)
    Auxiliary Output for connecting an external mixer or recording device
    Bass/Treble Tone Controls with tone defeat switch
    Bridging Input/Output for input expansion or recording device
    Direct Low-Impedance Output Mode bypasses output transformer
    Dual Mute Bus permits multiple levels of paging priority using optional mute-type modules
    Eight Module Slots accept any combination of TOA plug-in modules for custom system configurations
    Engineered for high performance with wide frequency response, very low noise and distortion, and excellent output regulation
    External Mute Terminals for activating mute function with external switch closure
    Five year warranty
    Individual Channel and Master Volume Controls
    Insert Jacks for connecting external signal processing
    Low Cut Switch to limit low frequency response
    Modular Eight Channel Mixer/Amplifiers for paging, background/foreground music distribution and music/messaging-on-hold
    Normal, Clip, Power, Protect, and Signal Indicators provide unit status
    Optional Rack-Mount Kit, MB-25B
    Over-current and Thermal Protection Circuitry prevents potential damage from overload, short-circuit and overheating
    Proven TOA Quality and Reliability
    Rear Panel AC Convenience Outlet for powering external equipment
    Remote Master Volume Terminals for control with an external 10k ohm linear-taper potentiometer
    Turn-On Delay disconnects output during power-up
    UL / cUL Listed
    Volume Control Security Knobs Included (4)
  • Product Type
  • Mixer/Amplifier

Description:

THE TOA 900 SERIES are widely recognized as the industry standard in installed sound system amplification. When reliability and performance are critical – such as in paging and music distribution for airport, hospital, and industrial sound systems – you can count on the TOA 900 Series to perform consistently, day-in and day-out.

High Performance

The A-903MK2 (30 W), A-906MK2 (60 W) and A-912MK2 (120 W) Modular Mixer/Amplifiers are engineered for high performance with wide frequency response, very low noise and distortion, and excellent output regulation.

Modular Design

Eight module slots allow you to easily configure custom configurations choosing from over fifty TOA plug-in modules with an extensive array of features and connector types. You can increase the input capacity by connecting a second mixer or mixer/amplifier to the rear-panel Bridge In/Out jack.

Versatile Features

Outputs include transformer isolated 25 V, 70 V and 8 ohm (A-903MK2: 4 ohm) plus a direct low-impedance mode if non-transformer operation is required. Multiple paging priorities are easily configured using optional mute-type modules activated by external switch-closure or mute-send modules. Pre-Out/Power-In jacks allow connection of external signal processing between the mixer and amplifier sections. Other features include protection circuitry, auxiliary output, bass/treble controls and remote master volume terminals. The 900 Series Mixer/Amplifiers are UL and cUL Listed and carry a five year warranty.

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