Audio Research LS-7 Vacuum Tube Preamplifier

Audio Research LS-7 vacuum tube preamplifier in excellent cosmetic condition and perfect working condition. The faceplate is excellent with no defects. The chassis is also in great shape with no scratches. This is a line stage only preamp that uses four (4) 6922 type vacuum tubes. It comes with the original Audio Research double box shipping cartons.

The LS-7 preamp has a very appealing straightforward design -- I love the simplicity, with power, volume, select, mute, a green light that tells you it's on and thats it. It features all-tube circuits that deliver rich, satisfying sound. It's a down-to-earth component design that is capable of stunning musicality.

Here's some specs from the Audio Research website:

Frequency response: ± .5dB, 1.0Hz to 100kHz -3dB points below 0.1Hz and above 300kHz
Distortion (THD): Less than .01% at 2V RMS output. (Typically .005% in midband)
Noise & hum: 15µV RMS maximum IHF weighted noise at main output with gain control minimum (more than 102dB below 2V RMS output)
Gain: 13dB unbalanced
Input impedance: 100K ohms.
Output impedance: 200 ohms main output. Recommended load 60K ohms and 100pF (20K ohms minimum and 1000pF maximum)
Rated outputs: 2V RMS 1Hz to 100kHz, all outputs, 60K ohm load (maximum output 25V RMS at 1/2% THD into 100K ohms)
Power supplies: Electronically-regulated low and high voltage supplies. Line regulation better than .01%
Tube complement: (4) 6922/E88cc dual triode
Power requirements: 100-135VAC 60Hz (200-270VAC 50/60Hz) 25 watts minimum
Dimensions: 19" (48 cm) W x 5 1/4" (13.4 cm) H (standard rack panel) x 10 1/4" (26 cm) D. Handles extend 1 1/2" (3.8 cm) forward of front panel. Rear chassis fittings extend 1/2" (1.3 cm).

You may also search for my video demo of the preamp on Youtube by searching with these terms: "jimmyvp1 audio research ls-7 preamplifier"

Rated 8 to be conservative, but I believe it would easily qualify as a 9 condition.