Alesis S4 Quadrasynth 90's Polyphonic 1U Rack Mount Synthesiser Sound Module
SKU: 28152846935

Alesis S4 Quadrasynth 90's Polyphonic 1U Rack Mount Synthesiser Sound Module

Sale price$175.05 Regular price$194.50
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Description

Alesis S4 Quadrasynth 90's Polyphonic 1U Rack Mount Synthesiser Sound ModuleAlesis S4 Quadrasynth 90's Polyphonic 1U Rack Mount Synthesiser Sound Module The S4 is the rack mount version of the QuadraSynth. It's a 64 voice digital synthesizer with a whopping 16 MB of sample ROM, and was the first synth to offer the ADAT Optical Digital interface. It also featured the same multi effects processor as the QuadraVerb 2, drum kits based on the D4 drum module, 4 assignable control knobs, one PCMCIA card slot, 48kHz clock input, and

 

Alesis S4 Quadrasynth 90's Polyphonic 1U Rack Mount Synthesiser Sound Module

The S4 is the rack-mount version of the QuadraSynth. It's a 64-voice digital synthesizer with a whopping 16 MB of sample ROM, and was the first synth to offer the ADAT Optical Digital interface. It also featured the same multi-effects processor as the QuadraVerb 2, drum kits based on the D4 drum module, 4 assignable control knobs, one PCMCIA card slot, 48kHz clock input, and 4 audio outputs.

The S4 is undoubtedly a powerful and flexible synthesiser capable of creating rich sounds - both acoustic and electronic. It uses digital additive/subtractive sample playback synthesis to create high quality stereo grand pianos, organs, strings, drums/percussion, brass, woodwinds, new and classic synth textures, and more. (Vintage Synth Explorer)

Condition:

• This unit has been used. 

• This unit has been thoroughly tested and everything is working as it should.

• This unit shows some minor wear from use and age. Nothing major at all. Please see all photos. 

• This unit shows some general wear from use and age like some marks, nicks and scratches. Nothing major at all. Please see all photos for further details. 

• The Alesis uses a 9V AC power adaptor. This adaptor will only be included for Australian & New Zealand buyers. 

• Overseas buyers will need to source their own power supply. Please get in touch if you need help sourcing the correct item. 

• This sale S4 unit only. Nothing else is included unless specified above. 

Specifications:

Polyphony - 64 voices
Oscillators - 48kHz Linear samples
S4: 16MB, expandable to 24MB using PCMCIA ROM and RAM cards
S4 Plus: 20MB, expandable to 28MB using PCMCIA ROM and RAM cards (no cards included)
Multitimbral - 16 parts
Effects - 4 On-board effects, based on the Alesis QuadraVerb 2 FX processor
Arpeg/Seq - None
Keyboard - None
Memory - S4: 128 preset 128 user programs, 100 preset, 100 user mixes
Control - MIDI IN/OUT/THRU (16-channels)
Date Produced - 1993 (S4)

Postage:

If you are in a remote area you may incur extra fees. 

International import tax, duty, vat, custom fees or any other charges are not covered by us, nor included in the shipping fees. These are the responsibility of the buyer. 

Return Policy:

Returns will only be accepted for manufacture defects / faulty items. Please contact us if you have any problems with your purchase and we will strive to work it out with you.

Please contact us with any enquiries, and check our store for more serviced pro audio ge

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 28152846935

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Danny Wilcoxx
Birmingham, US
★★★★★ 5
Cute Tray, Bad Charger
Color: Black
Worked for about a month, now it will only charge sometimes. Edit: Seller contacted me and replaced item. It is working perfectly fine now.
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Reviewed in the United States on March 28, 2025
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jessie
Chelsea, US
★★★★★ 3
The charger is slow
Color: Brown +Wireless
Looks great but the charging takes forever
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Reviewed in the United States on May 18, 2026
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EQ Mom
West Palm Beach, US
★★★★★ 5
Works Great!
Color: 2Pcs-Large L Hooks-Orange, Color: 2Pcs-Large L Hooks-Orange
The hooks were the perfect length and strength to hold the decorative fence edging I was wanting. The magnets were also the right strength. I would buy these again!
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Reviewed in the United States on August 3, 2025
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Wendi Cigrand
San Leandro, US
★★★★★ 4
Heavy duty - they have their limits
Color: 2Pcs-Large L Hooks-Black
These don’t hold a regular shovel, the magnet isn’t strong enough. They do work nice for plastic snow shovels. I use them in a Wick steel building. Nice to not have to drill into the walls. The depth is nice on them.
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Reviewed in the United States on August 5, 2025
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Tom Smart
Louisville, US
★★★★★ 5
Strongest yet!
Color: 4Pcs-Large L Hooks-Black
Strongest magnets that I have found. Used in a metal building to hang heavy tools. Will reorder!
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Reviewed in the United States on November 12, 2025

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