Alesis Quadraverb Plus, includes power supply and rack mount bolts/washers.

Great unit. Includes the power supply and rack mount bolts and washers. The Alesis Quadraverb Plus is an upgraded version of the classic 1990s 16-bit stereo digital multi-effects processor. Core Specifications & Architecture Bandwidth & Processing: 16Hz–20kHz full stereo bandwidth with 16-bit linear PCM conversion. Simultaneous Effects: Can run up to four digital effects at once (such as Reverb, Delay, EQ, and Pitch/Modulation effects) in serial, parallel, or combined routing configurations. Memory: 100 factory presets and 100 user memory slots. Hardware: Uses the same reliable hardware platform as the original Quadraverb; the "Plus" upgrade is enabled via a software/EPROM chip update. New & Expanded Features in the "Plus" Version Sampling: Adds a brief digital sampling capability (up to 1.55 seconds of 16-bit audio) with manual, audio, or MIDI triggering (One Shot and Gated modes) and basic looping. Ring Modulator: Generates sum-and-difference harmonics with left/right frequency shifting and mix controls. Resonators: Five distinct tunable resonators for pitch generation (chromatic adjustment from -24 to +36 semitones with MIDI gate chord tracking). Enhanced Multi-Tap Delay & Modulation: Adds multi-tap delay (up to 8 individual taps), auto-panning, and tremolo modulation with real-time MIDI parameter control over tap volume, delay, feedback, speed, and depth. Reverbs & Other Effects: Retains the classic Alesis plate, room, chamber, hall, and reverse reverbs (all gate-able), 3-band parametric/5-band/11-band graphic EQ, chorus, flanging, detune, phaser, and Leslie simulations.