Synths ⇝ Alesis ⇝ Alesis S4

The S4 is the rackmount version of the QuadraSynth. It can be expanded with 4MB and 8MB Alesis Q Cards and includes drum kits from the D4 drum module. The S4 was later upgraded and released as the S4 Plus.

Specifications

Year Released: 1993

Polyphony: 64 notes

Multitimbral: 16 parts

Preset Patches: 128

User Patches: 128

Preset Performances: 100

User Performances: 100

ROM: 16MB sampled at 48 kHz

Effects: Onboard effects based on the Alesis Q2 FX processor

Outputs: 4 1/4" audio outputs, ADAT optical

This is a 1-space rack unit.

User Demo Videos

Rating

File Downloads

Alesis S4 Manual

Items for Sale on Reverb

Eye and I productions Alesis Quadrasynth / S4 Voice Crystal 2 Mid 90’s Voice Crystal 2 for the Alesis S4 QuadraSynth 1994 ($74.99)

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

ALESIS Quadrasynth S4 Rackmount Synthesizer ($194.99)

Alesis Q Card Euro Dance 8MB for Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($129.99)

Alesis S4/QuadraSynth firmware upgrade OS V 1.07 Final S4 eprom update rom ($30.40)

Power Supply Replacement for Alesis Quadrasynth S4 Adapter Ac 9V 2000Ma 4 Pin Din ($29.33)

Power Supply Replacement for Alesis Quadrasynth S4 Plus Adapter Ac 9V 2000Ma 4 Pin D ($29.33)

Tip Replacement for Alesis 2.5Mm To 4 Pin Din Ac Adapter Convertor (Quadraverb P4 S4) ($11.71)

Alesis Qcard Sanctuary / ROM Waveform + Data Card // Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($176.70)

Alesis Qcard WORLD ETHNIC / ROM Waveform + Data Card // Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($176.70)

Alesis Q Card Qcard Classical 8MB for Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($99)

Used Lemon 12” x 4” RED Mesh Tom Snare w Clamp for Roland Alesis Strike Kit ($129.99)

Alesis 2.5MM to 4 pin din 9V AC power supply adapter converter quadraverb P4 S4 ($12.99)