Audio Research LS12 Stereo Preamplifer

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You are looking at a very gently used AR LS12. Considered by some to be one of the finest Solid State pre-amps ever made. It has that tube like sound, without the tubes. I have used the pre-amp with both tube and solid state amps and the one thing I can say is that it just sounds awsome. The unit is very quite, completely transparent with a lifelike timber and decay of tones... are its specs: Frequency response ± 1dB, 0.1Hz to 40kHz at rated output. -3dB points below 0.06Hz and above70kHz Distortion (THD) .01% at 2V RMS Balanced output Noise & hum 40µV RMS residual IHF-A weighted Balanced noise output with gain control at minimum (94dB below 2V RMS output) Gain Main output: 18dB Balanced 12dB Single Ended output Tape output: 0dB Balanced. (Processor output: 0dB Balanced) Input impedance 150K ohms Balanced. 75K ohms SE. Inputs (7): AUX SE, PHONO, TUNER, CD BAL, AUX BAL, MONITOR (SE), and PROCESSOR (SE). Output impedance 400 ohms Balanced, 200 ohms SE main, 10K ohms minimum load and 5000pF maximum capacitance. Outputs (4): 2 Main Bal, 1 Main SE, 1 Record SE. Output polarity Non inverting Maximum inputs 14V RMS maximum Balanced, (7V RMS SE) Rated outputs 2V RMS (1V RMS SE) into 200K ohm. Balanced load (maximum Balanced output capability is 12V RMS at 1% THD at 1kHz). Power supplies Electronically regulated low and high voltage supplies. read more

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