Tube Preamp Reviews

Description: Vacuum-tube stereo preamplifier. Frequency response: 15Hz-30kHz, ±1dB. Distortion (THD): 0.005% at 5V out. Maximum output: 25V at 1kHz. S/N Ratio: 90dB (Aux input, no ref. level given).
Dimensions: 15 5/8" W by 5" H x 12½ D.
Price: $595 (SP-3, 1971-73); $795 (SP-3A, 1974); no longer manufactured (2003).
Manufacturer: Audio Research Corporation, 2843 26th Avenue South, Minneapolis, MN 55406 (1973); Audio Research Corporation, 3900 Annapolis Lane North, Plymouth, MN 55447-5447. Tel: (763) 577-9700. Fax: (763) 577-0323. Web: www.audioresearch.com (2003)