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AUDIO RESEARCH LS7 TUBE STEREO PREAMPLIFIER PREAMP Picture(s) and Description:
AUDIO RESEARCH LS7 TUBE STEREO PREAMPLIFIER PREAMP INTERNATIONAL BIDDERS: SHIPPING COSTS ARE LISTED BELOW. AND LIKE ALL US-MADE ELECTRONICS, IT IS 117 VOLTS. YOU NEED A STEP DOWN TRANSFORMER FOR IT TO WORK IN 200/240 VOLT COUNTRIES. EASY! For your consideration a beautiful & fine sounding LS7 tube stereo preamplifier from AUDIO RESEARCH. This preamp is in pristine condition and works beautifully, without hum or any noise. See pictures for detail. COMES WITH ORIGINAL BOX, manual and warranty card. Box shows some wear while preamp is MINT Sounds magnificent, relaxed, sweet and super musical. Completely dead quiet, no hum no issues of any sort. 100% plug & play. No phono section with this line-stage preamp. Here are the specs found on a very good AR site: 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 15V 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 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). Intl Mailing Costs (Priority Airmail) Western Europe: $97.50 Russia: $114.75 Japan/Hong Kong/ China/Korea: $118.50 Thailand/Australia/Taiwan/Vietnam/Singapore: 138.15 No returns, sold as is due to age, but guaranteed not DOA. _gsrx_vers_334 (GS 5.4.3 (334))
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