This unit is in Good condition. There are some scratches on the bottom of the chassis. Does not come with a power supply. 

The Alesis QuadraVerb is a 16Hz-20kHz bandwidth stereo programmable effects box with four digital effects (EQ, Pitch Change, Delay, Reverb). The effects can be used in parallel or in serial (or a combination). Dynamic range is 85dB, less than .1% distortion. Processor speed- 24 MIPS.         Conversion scheme is 16-bit linear PCM.    

The Quadraverb stores 100 programs and ship with 90 presets (in ROM) that you can overlay into the RAM. Real-time control of 8 simultaneous parameters via MIDI (you pick the controller type and the parameter it controls). All functions, parameters and volume levels are programmable per program.

Stereo In/Out (via four 1/4 inch jacks).

Dimensions:    19" x 6-1/4" x 2"