Synths ⇝ Alesis ⇝ Alesis QuadraSynth

The Quadrasynth was the first synthesizer produced by Alesis and is named for the synthesis engine, which allows up to four 16-bit PCM waveforms to be combined into a single sound. Although it has 64 notes of polyphony, it should be thought of as 64 "tones" of polyphony, since using multiple waveforms in a patch reduces polyphony by a corresponding amount (with 4-tone patches having 16 notes of polyphony). Its 16MB ROM could be increased another 4MB or 8MB with PCMCIA expansion Q Cards. It was also the first synthesizer to offer the ADAT digital optical interface.

Specifications

Year Released: 1993

Keyboard: 76 keys with velocity and aftertouch

Polyphony: 64 notes

Multitimbral: 16 parts

Preset Patches: 128

User Patches: 128

Preset Performances: 100

User Performances: 100

ROM: 16 MB

This keyboard is MIDI-enabled.

MIDI Connections: Standard 5-Pin MIDI in, out, and thru connections.

User Demo Videos

Rating

File Downloads

Alesis QuadraSynth Manual

Items for Sale on Reverb

Alesis QuadraSynth pickup only [Three Wave Music] ($299.95)

Alesis Quadrasynth Plus Piano ($175)

Alesis QuadraSynth Plus Piano ($199.95)

Alesis QuadraSynth 1993 ($504.84)

Rare Vintage Alesis Quadrasynth - Unmistakable 90's Styling ($525.11)

Alesis - QuadraSynth - MIDI jack ($3.99)

Alesis QuadraSynth 1994 - Dark Gray ($499)

Alesis QUADRASYNTH PIANO PLUS 1995 ($397.06)

ALESIS "QuadraSynth" 76-Key Synthesizer. SERVICED. Works Great ! Sounds Perfect !... ($149)

Alesis - Fusion , QS , QuadraSynth - POWER SWITCH ($7.99)

Alesis - Nano Series , QuadraSynth , 3630 Compressor - Rotary potentiometer ($12.99)

Alesis - Quadraverb 2 , QuadraSynth , NanoCompressor , Q20 - Stereo phone jack 1/4-inch 6-pin PCB ($10.90)

Alesis S4 Quadrasynth 90's - Black ($200)

Alesis - Q20 , QS8.1 , QuadraSynth , QSR , Midiverb 4 , QS6/8 - Mono phone jack ($10.90)

Alesis - Andromeda , DM Pro , SR Series , Fusion , QuadraSynth - 3v Battery ($14.90)

Power Supply Replacement for Alesis Quadrasynth S4 Plus Adapter Ac 9V 2000Ma 4 Pin D ($28.10)

Power Supply Replacement for Alesis Quadrasynth S4 Adapter Ac 9V 2000Ma 4 Pin Din ($28.10)

Alesis S4/QuadraSynth firmware upgrade OS V 1.07 Final S4 eprom update rom ($28.30)

Alesis Q Card Euro Dance 8MB for Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($142.49)

Fatar Replacement HALF Weighted D Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted F Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted A Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted D Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted B Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted F Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted A Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted G Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted SHARP/BLACK Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($7.95)

Fatar Replacement HALF Weighted B Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted G Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted B Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted SHARP/BLACK Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($7.95)

Fatar Replacement HALF Weighted E Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted C Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted SHARP/BLACK Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($7.95)

Fatar Replacement HALF Weighted C Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted SHARP/BLACK Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($7.95)

Fatar Replacement HALF Weighted B Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted D Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted F Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted A Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted D Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($10.95)

Fatar Replacement HALF Weighted SHARP/BLACK Key (TP/9S Keybeds) for Kurzweil K2000, Alesis Quadrasynth, Ensoniq SQ2, GEM WX2, Equinox 61, Oberheim OB-3 ($7.95)

Alesis Prestige Quadrasynth Digital Piano Keyboard Dust Cover by DCFY!® | Customize Color, Fabric & Padding Options - Made in U.S.A. ($45.98)

ALESIS Quadrasynth S4 Rackmount Synthesizer ($194.99)

Alesis QuadraSynth Multi-Timbral Keyboard Synthesizer for Parts Repair Lot 82-363 ($129.99)

Alesis Melody Quadrasynth Digital Piano Keyboard Dust Cover by DCFY!® | Customize Color, Fabric & Padding Options - Made in U.S.A. ($45.98)

Alesis V Quadrasynth Digital Piano Keyboard Dust Cover by DCFY!® | Customize Color, Fabric & Padding Options - Made in U.S.A. ($45.98)

Alesis Harmony Quadrasynth Digital Piano Keyboard Dust Cover by DCFY!® | Customize Color, Fabric & Padding Options - Made in U.S.A. ($45.98)

Alesis Q Quadrasynth Digital Piano Keyboard Dust Cover by DCFY!® | Customize Color, Fabric & Padding Options - Made in U.S.A. ($45.98)