Audio Research - Reference one & 2 units Reference 600 - - Catawiki
ARCDB | REFERENCE 600
Audio Research PH9 phono preamplifier
Audio Research Reference 600 tube amplifiers Photo #781261 - US Audio Mart
Audio Research - π Late 70's Early 80's and 90's Following the success of the SP-3, and amplifiers like the D-150, Audio Research was able to grow both in terms of size