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About the SP-16L
The Audio Research SP-16L is a vacuum tube line-stage preamplifier from Audio Research's SP16 series, omitting the phono section of the full SP16 to focus exclusively on line-level inputs. It uses 12AX7 vacuum tubes in a pure Class A all-tube gain stage, providing multiple line inputs (CD, tuner, video, aux, processor bypass), dual main outputs, and a tape output. The SP-16L includes remote control for volume, input selection, mute, and stereo/mono functions, along with a 12V trigger for power control of amplifiers. Produced from approximately 2002 to 2006, it is now discontinued. Known for its quiet, detailed, and musical character with a fine tube sound, it remains a respected vintage ARC preamp.
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