I bought this item used in the 90's from a friend whom I traded gear with from time to time. It really is a unique synth, and I don't think there are many others that can compare to it. This unit looks Very Good to Excellent. You can tell it has been mounted in a rack, but has no signs of misuse or abuse. Functionally, it works as it is supposed to. I also have the Owner's Manual in .pdf format, and have the original power supply.
The Peavey DPM Spectrum Bass tone module is an eight-voice sample playback device containing 1 megabyte of classic bass waveforms. These waveforms are run through a dynamic resonant filter to achieve the kind of fat bass sounds that will make your groove tracks stand out. Stacking these sounds up to four deep will give you dense, rattle-the-windows bass.