Audio Research Tube PreamplifierLS7Audio Research Tube Preamplifier LS7This is an auction, not a classified listing. You're bidding on the Audio Research LS7 tube preamplifier. The LS7 stereo line preamplifier features all-tube circuits that deliver rich, satisfying...501.00

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Audio Research Tube Preamplifier LS7 [Expired]


no longer for sale

This is an auction, not a classified listing. You're bidding on the Audio Research LS7 tube preamplifier. The LS7 stereo line preamplifier features all-tube circuits that deliver rich, satisfying sound and world-renowned Audio Research construction. The item is well maintained and doesn't have any blemishes. The stock tubes were upgraded to NOS Amperex Holland from Vintage Tube Services. I'm the second owner and do not have the original box or manual - both can be obtained from ARC. I guarantee the item will arrive at your destination without incident or complaint. Professional packing and standard UPS ground shipping in the continental U.S. will be paid by seller. If you need it sooner, we'll work out the details once the auction closes and you're awarded the sale. 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 Main output - 13dB unbalanced Tape output - 0dB Input impedance 100K ohms. Output impedance 200 ohms main output. Recommended load 60K ohms and 100pF (20K ohms minimum and 1000pF maximum) Output polarity Maximum inputs 20V 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 Operating voltage Equipped for the U.S. market - 120 volts AC Other Inputs (5): tape, tuner, CD, video, aux Controls: Gain, input selector Toggle switches: power/off, mute/operate 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).
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wescoman 

Last 12 months
All-time15100.0%

Member since February 2012

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