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.

Blue rackmount audio compressor unit with knobs, toggle switch, meter, and lit buttons on front panel.

studio

ANTELOPE AUDIO A4-1B Analog Automated Opto Valve Compressor - Ultimate

$4,925.00USD

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

Best for

Hybrid studios wanting analog opto/tube compression with hardware controls plus DAW recall and automation.

Who should skip

Users wanting a fully digital plug-in only, a stereo two-channel compressor, or a budget non-recallable hardware compressor.

Watchouts

GTIN was not found. Accessible manufacturer specs identify the hardware as A4-1B; exact Ultimate bundle entitlements should be confirmed at purchase.

Likely add-ons

  • appropriate audio and data cables
  • compatible monitoring, mounting, or power setup

Verify before buying

  • Which connections, drivers, operating systems, and sample rates are supported by this exact revision?
  • What cables, mounts, power supplies, or licenses are included?
  • Is the current retailer listing new stock, demo stock, open box, or special order?
  • Is the item still in stock at the displayed price, and what is the complete delivered cost to the intended destination?