Audio Research SP-11 preamplifier Description

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Specifications: Hybrid solid-state/tube preamplifier with separate power supply. Inputs: Phono (high-gain MM), Tuner, CD, Video (sound only), Tape 1, Tape 2. Outputs: Tape 1, Tape 2, Main 1, Main 2, Invert, Direct. Controls: Gain, Level, Balance, Mode (Mono, Reverse, Stereo, Left, Right), Input (All but tape), Impedance (cartridge loading), Tape Monitor, Copy switch, Copy mode (1-2, 2-1), Manual Mute, Polarity (Invert/Normal), Bypass, Subsonic Filter. Frequency response: High level 1Hz-100kHz, ±0.5dB, -3dB at 0.2Hz and 250kHz. RIAA accuracy: 20Hz-40kHz ±0.2dB. Harmonic distortion: 0.005% at 2V out, 5Hz-30kHz (typically 0.001% midband). Voltage gain: 30dB line level, 76dB phono. Noise: -110dB at 2V out, gain down. Line Input: high level, gain max, 106dB below 1V in. Phono Input: 74dB below 1 mV in.
Dimensions: Power supply and Preamp: both 19" W by 5.5" by 15.5" D, overall, including front handles and rear interconnect clearance.
Price: (Hold your breath!) $4900 (1986); no longer available (2003).
Manufacturer: Audio Research Corp., 6801 Shingle Creek Pkwy., Minneapolis, MN 55430 (1986). Audio Research Corp., 3900 Annapolis Lane North, Plymouth, MN 55447-5447. Tel: (763) 577-9700. Fax: (763) 577-0323. Web: www.audioresearch.com (2003).

COMPANY INFO
Audio Research
3900 Annapolis Lane North
Plymouth, MN 55447-5447
(763) 577-9700
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