via this auction

It has a phono input stage so you can plug a turntable straight into it for sampling into old MPCs or other samplers... if only I'd owned this and my old 2000XL at the same time, I would never have let the 2KXL go!
It's an 8 Pole filter which can operate in stereo 2 or 4-Pole mode, or 2, 4 or even 8-Pole in mono. So when I used to plug this into an analogue monosynth, I ran it in 8-Pole mode for an extreme 8db per octave - in this extreme slope mode you can really twist sounds or make the purest, deepest bass without the volume loss shallower curves produce. Unlike some of the tamer filters built into a lot of synths and samplers, this one can be pushed all the way to extremes.