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

Alesis S4 Quadrasynth ($229.99)

Alesis S4 Plus Quadrasynth Synth Module - needs new pwr switch? ($79)

Alesis S4 Plus QuadraSynth MIDI sound module ($164.99)

Alesis S4 Quadrasynth Plus ($224.99)

Alesis S4 Quadrasynth 90's - Black ($250)

Alesis S4+ QuadraSynth 1995 ($200)

Alesis Quadracard - Grand Piano (for quadrasynth) ($124.99)

Alesis "Product Line '96" 1996 Catalog (Adat XT, QS8, X2, Q2, DM5, S4 Plus, etc) ($10)

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

Alesis S4/QuadraSynth firmware upgrade OS V 1.07 Final S4 eprom update rom ($27.84)

Power Supply Replacement for Alesis Quadrasynth S4 Plus Adapter Ac 9V 2000Ma 4 Pin D ($27.03)

Power Supply Replacement for Alesis Quadrasynth S4 Adapter Ac 9V 2000Ma 4 Pin Din ($27.03)

Tip Replacement for Alesis 2.5Mm To 4 Pin Din Ac Adapter Convertor (Quadraverb P4 S4) ($10.81)

Original Genuine Alesis AC09-25D Power Supply for Datadisk Quadraverbs S4 1622 & More.. ($30)

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

Alesis Midiverb 4 - Original Owner's Reference Manual w/Prog Sheets ($10)