I've got an older Musical Fidelity P172 Preamp. it's a 19" 1U rackmount size (in black) . MM/MC switchable phono, CD, Tuner, 2 tape loops, 1 is independently switchable (for recording a different source to the one being listened to. 2 sets of outputs as well so you can bi-amp with it. its got bass treble and balance controls, however the volume pot is a little bit noisy. I've gone all valve now (WAD PreII) so it's surplus to requirements
looking for £75 for it. I've got the original box, but not sure about manuals.