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About the SP-17L
The Audio Research SP-17L is a single-ended, line-level vacuum-tube preamplifier that omits the SP-17’s phono stage. It uses two 6H30 tubes, a regulated high-voltage supply, a 103-step volume control, and RCA line-level connections including CD, tuner, video, aux, and processor inputs. The line section provides 11.1 dB of gain, 210-ohm single-ended output impedance, and a frequency response of 0.6 Hz to 80 kHz within ±1 dB, with wider -3 dB limits below 0.3 Hz and above 120 kHz. It is housed in a 19-inch-wide chassis measuring approximately 19 x 5.2 x 10 inches and weighing about 5.7 kg.
Specifications
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