Synths ⇝ Alesis ⇝ Alesis S4 Plus

The S4 Plus is an updated version of the Alesis S4 with a larger sound ROM and more patch and performance ("mix") presets. It is the rackmount version of the QuadraSynth Plus but has a slightly different set of piano sounds. It can be expanded with 4MB and 8MB Alesis Q Cards.

Specifications

Year Released: 1995

Polyphony: 64 notes

Multitimbral: 16 parts

Preset Patches: 512

User Patches: 128

Preset Performances: 400

User Performances: 100

ROM: 20MB 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

Alesis QuadraSynth Plus Piano / S4 Plus Keyboard/Module - Original Brochure ($8.50)

Power Supply Replacement for Alesis Quadrasynth S4 Plus Adapter Ac 9V 2000Ma 4 Pin D ($26.99)

Alesis Qcard WORLD ETHNIC / ROM Waveform + Data Card // Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($155.74)

Alesis Qcard Sanctuary / ROM Waveform + Data Card // Quadrasynth, QSR, S4 / Plus, QS6, QS7, QS8 ($155.74)