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3. GENERAL DESCRIPTION
TOA's A-903MK2, A-906MK2, and A-912MK2 Mixer Power Amplifiers feature 8 input slots that permit the use
of various optional plug-in modules. The most appropriate plug-in modules can be selected depending on
applications. The Mixer Power Amplifiers are identical except for output power: A-903MK2 (30 W), A-906MK2
(60 W), and A-912MK2 (120 W).
The speaker output terminals are designed to match 25 V or 70 V line, or 4 Ω or 8 Ω speaker systems.
Each Mixer Power Amplifier can be mounted in an EIA equipment rack with the addition of the optional MB-
25B Rack Mounting Bracket. The optional perforated panel PF-511 provides suitable ventilation, finished in
black color to match the Mixer Power Amplifiers.
4. FEATURES
• Plug-in modular construction
• A wide frequency response of 20 to 20,000 Hz (±1 dB)
• Low distortion and low noise
• Remote volume control connection
• Independent bass and treble controls
• Bridging Input/Output Jack for easy system expansion
• Built-in protection circuitry
• Usable a wide range of plug-in optional modules
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