Check the listing for details. Alesis Quadraverb 20K Bandwidth Simultaneous Digital Effects Processor Rack. Color: Black, Condition: Used. Listed at 275.00 USD. Alesis Quadraverb 20K Bandwidth Simultaneous Digital Effects Processor offers professional-grade sound manipulation in a classic rack-mount design. This fully programmable, MIDI-addressable unit features a wide range of effects including reverb, delay, pitch, EQ, and modulation. The front panel provides intuitive control with dedicated input and output knobs, a clear LCD display, and tactile buttons for quick parameter adjustments and program storage. Ideal for studio recording or live sound reinforcement, it delivers high-quality digital processing for guitarists, keyboardists, and vocalists alike. Note that this unit shows cosmetic wear on the top casing consistent with studio use and rack mounting. No power cord. Make offer