Tested and cleaned. All knobs, tact switches, inputs/outputs, and displays tested and working. Was kept in smoke free studio. All factory presets are loaded into memory. Comes with brand new US plug AC adapter. There is a minor cosmetic dent at center bottom shown in pictures but otherwise looks like new. This vintage synthesizer is an important early product from Korg Japan. It has some amazing vintage retro 1980s sounds.

The Korg EX-800, released in 1984, is the desktop and rack-mountable expander version of the popular Korg Poly-800 synthesizer. It packs the exact same analog-hybrid sound engine into a compact black box without a keyboard, offering 8-voice polyphony, digitally controlled oscillators (DCOs), and a shared resonant low-pass filter. [1, 2, 3, 4, 5]Key Features and Specs

• Sound Engine: Paraphonic design with 8-voice single-oscillator mode or 4-voice double-oscillator (stacked) mode.
• Oscillators: Digitally controlled square-wave oscillators with additive harmonic footage switches (16′, 8′, 4′, 2′).
• Filter: 24dB/octave resonant analog low-pass filter shared across all voices.
• Envelopes: Unique 6-stage envelope generators (attack, decay, break point, slope, sustain, release).
• Effects: Onboard stereo chorus.
• Memory & Sequencer: 64 editable presets and a 256-event step-time sequencer.
• Connectivity: MIDI (In, Out, Thru) and a tape interface.