A4‑1B Analog Automated Opto Valve Compressor
The Antelope Audio A4‑1B Analog Automated Opto Valve Compressor is a modern reimagining of a legendary Danish opto‑tube compressor, combining the unmistakable warmth of true analog valve compression with the power, precision, and recall ability of digital control. Built around a 100% purely analog signal path, the A4‑1B features premium tubes, custom UK‑made transformers, and a pre‑sorted opto‑cell that delivers smooth, musical, and transparent compression—even under heavy gain reduction—making it ideal for vocals, bass, acoustic instruments, and mix‑bus duties.
What sets the A4‑1B apart is Antelope’s Analog Automation technology, which integrates proprietary motorized potentiometers with a DAW plug‑in (VST3, AU, AAX). This allows full remote control, total recall, and real‑time automation of classic hardware parameters such as attack, release, threshold, ratio, and gain—without compromising analog integrity. Additional modern functionality, including sidechain filtering, de‑essing, A/B testing, and automatic calibration systems, makes the A4‑1B equally suited for contemporary hybrid workflows and traditional all‑analog studios.
What’s in the Box
- A4‑1B Analog Automated Opto Valve Compressor
- Power cable
- USB‑C to USB‑C cable
- Get Started guide
- A4‑1B Plugin perpetual license leaflet
