This is an early Gary Morrison designed pre with phono inputs for Moving Magnet (MM) and Moving Coil (MC), the MC input has capacitor loading but not impedance loading. The Phono stage is mostly discrete components but the rest of the amplifier has a lot of op-amp integrated circuit chips, many LM353 originally. This amp has been retrofitted with IC sockets and the old IC's replaced with new/other IC's, a mixture - NE5532, LM388. There are (apparently?) better more modern IC's available to replace the originals however the original ones often become noisy and unreliable with age and may have needed replacing anyway. At least one of the RCA input sockets needed re-soldering, this was causing more than just a non working input it also caused various other random faults as the earth line was disconnected through the socket path; it took me a while to find that this was the problem as some of the faults were relays making odd connect decisions? and other random faults when switching inputs...as soon as I found and fixed the broken RCA input socket all the weird faults disappeared!!
Sounds quite good, clean-ish detailed and clear and fast, a little low level hiss but only when the volume is high so hardly an issue. This may well all change if and when the op-amps are replaced, hopefully for the better, but I'll wait and see!