Quad FM3

Submitted by dada on Sat, 05/11/2019 - 18:01

This is the solid-state replacement for the FM2 above, fitting into the same case as the 33 preamp and looking almost identical to the FM2 from the front, except that the indicator lights are in the reverse positions. There are three distinct versions: serial nos. 1-5884, 5885-9999, and 10,000 upwards. To our ears the early FM3 before serial number 5885 sounds better than the later one, although it is more of a servicing headache: the MC1305P decoder chip used early in the production run has seven adjustments to the two required by the MC1310P used subsequently.