SP16

About the SP16

The Audio Research SP-16 is a full-function vacuum tube preamplifier produced from 2001 to 2007, designed with pure Class-A all-tube gain stages using six 12AX7 tubes (three for line stage and three for the MM phono stage). It offers five line inputs (Phono, CD, Tuner, Video, Aux), a dedicated processor bypass input, record output, and two sets of main outputs. The unit includes features such as a mono button, 12V trigger for power control of other devices, and full remote control for power, input selection, volume, mute, and stereo/mono switching. The SP-16 has no knobs or toggle switches on the front panel, instead using pushbuttons and remote control for operation. It is known for a quiet, detailed, and musical sound with a fine phono section suitable for medium to high output cartridges. The preamplifier has a frequency response of 1Hz to 60kHz, very low distortion (<0.007%), and a gain of 11.5dB for line inputs and 55dB for the phono input. It uses high-quality components including Nichicon, Ero, Wima, and Relcap capacitors, and features a well-ventilated metal chassis. Dimensions are approximately 450 x 132 x 254 mm, weighing about 5.7 kg. The SP-16 is regarded as a significant improvement over previous ARC models, offering enhanced soundstage, clarity, and ergonomics while maintaining the classic tube sound signature of Audio Research.