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Audio Research SDP1 multichannel music processor:
Sidebar 1: Specification Description: L-R ambience extractor. Inputs: one pair, balanced or unbalanced. Input impedance: 1.5Megohms unbalanced, 3M ohms balanced. Gain: 12dB maximum (6dB balanced into unbalanced out, 10dB unbalanced into balanced out). Frequency response: 2Hz-400kHz +0, -3dB. Distortion: <0.01% at 2V out. Noise: <30µV RMS, IHF-weighted, center channel. Maximum output: 18V balanced. Controls: two surround level, one center level, surround delay (25, 28, 32, 38, and 45 milliseconds), Mute, Power. Outputs: one pair surround, one pair pass-through L and R, one center, all balanced and unbalanced. Power consumption: 40W.
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