Envoy Music
  • Pedals
  • Parts
  • Studio
  • Production
  • How we verify
Envoy Music

Pedals, parts, studio, and production gear with reviewed product data, prices in CAD, and one Envoy checkout.

Shop

  • Pedals
  • Parts
  • Studio
  • Production

Envoy

  • About Envoy
  • How we verify
  • Contact

Support

  • Shipping
  • Returns
  • Privacy
  • Terms

© 2026 Envoy Music. All rights reserved.

Prices shown in CAD. Orders and support are handled by Envoy.

Alesis S4 Plus Quadrasynth Rack, keyboard synthesizer instrument

Keyboards and Synths / Synths / Rackmount Synths / Keyboards and Synths / Synths / Digital Synths

Alesis S4 Plus Quadrasynth Rack

$544.63USD

Checkout with Envoy Music. This item may be dispatched by an approved fulfillment partner.

Likely add-ons

  • keyboard stand
  • sustain pedal
  • headphones or amp

Verify before buying

  • Can you confirm exactly what is included in the sale and show it in current photos?
  • Are there any functional issues, repairs, or missing parts not shown in the listing?
  • Can you provide close-up photos of wear points, serial numbers, and any modifications?
  • Can you confirm the core specs that matter for compatibility in this setup?
  • Is this still available and has anything changed since the listing was posted?