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.
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.
Alesis S4 ($231.88)
Alesis S4 Quadrasynth ($234.99)
Alesis S4 Quadrasynth 2000s - Black ($200)
Alesis S4 midi sound module -From the Leon Russell Estate ($215)
Alesis S4 Quadrasynth 90's Polyphonic 1U Rack Mount Synthesiser Sound Module ($278.08)
Alesis Quadrasynth S4 plus ($125)
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 ($28.31)
Alesis S4/QuadraSynth firmware upgrade OS V 1.07 Final S4 Eprom Update ($28.31)
Power Supply Replacement for Alesis Quadrasynth S4 Adapter Ac 9V 2000Ma 4 Pin Din ($27.61)
Power Supply Replacement for Alesis Quadrasynth S4 Plus Adapter Ac 9V 2000Ma 4 Pin D ($27.61)
Alesis S4+ Sound Module ($200)
Tip Replacement for Alesis 2.5Mm To 4 Pin Din Ac Adapter Convertor (Quadraverb P4 S4) ($11.04)
Alesis Quadrasynth & S4 Reference Manual ($14.99)
Alesis AC09-25D DIN Power Supply for Quadraverb, QSR, DM Pro, S4, QS6, Wedge ($69.99)
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)
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