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TOA A903MK2UL 30-watt Modular Mixer/amplifier

The A-903MK2 is a modular mixer/amplifier from TOA's 900 series, the long-running standard for installed background music and paging. It mixes and controls up to eight independent input signals and delivers 30 watts of output, enough to drive a distributed ceiling or wall speaker zone in a retail floor, restaurant, or office. Eight module slots let you build the input roster from TOA's plug-in modules, choosing the mic, line, and telephone-paging interfaces the room actually needs.

Transformer-isolated 25V, 70V, and 8-ohm outputs make it easy to run long constant-voltage speaker lines or a low-impedance load, and a direct low-impedance mode is available when no transformer is needed. Wide frequency response with very low noise and distortion keeps music clean and speech intelligible. The chassis occupies 2U of rack space and runs on 120V AC. Input modules are ordered separately.

TypeModular mixer/amplifier, 900 series
Rated Output30 W
Input Module SlotsEight
Output Taps25V, 70V, 8 ohm, plus direct low-impedance
Frequency Response20-20,000 Hz, -1 dB
THD0.02% at 1 kHz, rated output
Rack Space2U
PowerAC 120V, 60 Hz