Audio Research SP-1 Preamplifier

Audio Research writes: “It’s SP-1 day at Audio Research. We have two here for service and one is a unicorn, an SP-1 from Electronic Industries, in a finish none of us had seen before. E.I. was Bill Johnson’s first company, before he created Audio Research in 1970. The original local owner of this SP-1 bought it from Bill in 1969, and it was the only one sold in a champagne finish. It is here for a full restoration. The Audio Research SP-1 in silver and black has tape around its periphery to protect the front panel when it went through service. Here we have it connected and sounding good with a Reference 80S in our engineering system.  We stock a lot of parts for legacy products and do our best to repair as many of them as possible, including 54 year old preamps.”