Audio Research LS7 Stereo Tube Preamplifier; LS-7

Audio Research LS-16 Tube Preamplifier in excellent condition

Audio Research Vintage LS-15 Line Stage Tube Preamplifier with Optional Remote!

Audio Research LS8 preamplifier

Audio Research PH1 Phono Preamp--Very Nice

QUICKSILVER AUDIO LINE STAGE TUBE PREAMPLIFIER

Krell KSL-2 Stereo Preamplifier — Analog Solid State — Tested + Working

Audio Research PH3 Hybrid Tube MM / MC Phono Stage Preamplifier in Black EXCELLE