TOA A-903MK2 8 Channel Mixer Amplifier

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TOA A-903MK2 8 Channel Mixer Amplifier

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TOA A-903MK2 8 Channel Mixer Amplifier

Part # A-903MK2 UL

Model # A-903MK2

TOA A-903MK2 8 Channel Mixer Amplifier. The TOA 900 SERIES are widely recognized as the industry standard in installed sound system amplification. Great for paging and music distribution in airports, hospitals, schools, and industrial sound systems.

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Description

Details

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.

Features

Features

Modular Eight Channel Mixer Amplifier
Engineered for High Performance
Eight Module Slots
25 V, 70 V and 8 Ohm Transformer-Isolated Speaker Outputs
Direct Low-Impedance Output Mode
Dual Mute Bus
External Mute Terminals
Remote Master Volume
Individual Channel and Master
Volume Controls
Bass/Treble Tone Controls
Auxiliary Output
Turn-On Delay
Volume Control Security Knobs
Included (4) Optional Rack-Mount Kits

Specification

Type	8-channel mixer power amplifier
Power Requirement	AC mains, 120 V, 60 Hz
Power Consumption	60 W
Output Power	30 W RMS
Power Bandwidth	(D) 20 - 20k Hz, 0.5% THD (T) 50 - 20k Hz, 0.5% THD
Frequency Response	(D) 20 - 20k Hz, ±1 dB (T) 20 - 15k Hz, ±1 dB (T) 20 - 20k Hz, +1 dB / -3 dB
Total Harmonic Distortion	0.02% at 1k Hz, rated output
Inputs	8 input ports: every port accepts any input module 1 Bridging Input/Output
Input Sensitivity& Impedance	Input Port #1 to #8: 100 mV/10 k Ohms Bridging Input/ Output: 100 mV/ 3.3 k Ohms
Pre-amp. Out/Power Amp. In	1000 mV into 600 Ohms / 1000 mV, 10 k Ohms
Outputs ((T)=Transformer(D)=Direct)	Main (T): 4 Ohms, 25 V & 70 V, balanced Main (D): 8 Ohms, unbalanced Aux: 1 V, 10 k Ohms
Output Regulation(1k Hz)	(D): Less than 0.5 dB, no load to full load (T): Less than 1.0 dB, no load to full load
S/N Ratio (Band Pass: 20 - 20k Hz,with Tone defeat switch on)	Master volume set to min.: 90 dB Master volume set to max.: 77 dB Power amplifier only: 105 dB
Tone Controls	Bass: ±10 dB at 100 Hz Treble: ±10 dB at 10k Hz
Indicators	1 Power LED, 1 Protect LED, 1 Signal LED, 1 Normal LED, 1 Peak LED
Protection	Self-protection, with internal AC fuse (inside)
Temperature Range	12° F to 140° F (-10° C to +60° C)
Dimensions (H x W x D)	3.9" (99.1 mm) x 16.54" (420 mm) x 12.52" (318 mm)
Weight	17.2 lbs (7.8 kg)

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