LS15

About the LS15

The Audio Research LS15, introduced in 1996, replaces the LS2/2BMKII series and is designed as a stereo tube line stage preamplifier. It uses four 6922 twin triode tubes operating in Class A with a fully differential zero feedback balanced circuit. The unit includes electronically regulated high and low voltage power supplies for stability and performance. It features a 70-step electronic relay attenuator controlled by an onboard microprocessor, a 5-position input selector, and a handheld IR remote control for all essential front panel functions. The LS15 offers two balanced and five single-ended inputs (including tape), plus an additional Direct balanced input for the highest signal purity. Outputs include balanced and single-ended main outputs and a pair of single-ended tape outputs. The front panel is anodized aluminum, available in natural or black finishes, with options for cabinet style or rack-mount holes. Factory-set gain is 12 dB standard, with an optional 18 dB gain at no extra charge. The preamplifier is known for minimal signal degradation due to spring-activated toggle switches controlling electronic relays for key functions. Dimensions are 19" (48 cm) wide, 5 ¼" (13.3 cm) high, and 10½" (26.7 cm) deep, weighing approximately 11.6 lbs (5.3 kg).