Audio Research SP3 Preamplifiers

I bought this Audio Research SP 3 in mint condition to augment my system that consists of a custom-built pair of 6146 mono amplifier, Thorens 160 Super turntable/ SME 3009 Series IIIs tonearm with Shure V15 type III driving a pair of DQ 10 speakers....

bought this unit used but restored eith the caps. replaced and a new set of tubes. The internal wire had been upgraded also due to age. This preamp will sing! the SP3 is classic looking (read old) but quite functional and simple when compared with some...