Classic hardware compression with a modern twist
Not just inspired. Reimagined.
The Future of Analog Gear
A4-1B combines the legendary sound and design of analog Opto-Tube compressor with modern-day workflow enhancements. Experience its signature hardware audio processing or take it a step further by accessing an array of contemporary functionalities.* Classic compression sound
- Classic compression sound
- Pristine analog signal path
- Plugin control with presets and automation
- Proprietary motorized potentiometers
- Automatic calibration systems
- Sidechain filtering with de-essing
As authentic as it gets.
A4-1B was designed to preserve vintage Opto-Tube units’ highly praised smoothness and musicality. Even when pushed to the limit, the compressor remains transparent, breathing new life into vocal tracks, bass, keys, or percussion. A4-1B sounds and reacts just like the legendary hardware that inspired it allowing you to apply the legendary sound of Opto-Valve compression to your modern production.
Under the hood.
Revolutionized Analog Power
High-quality components ensure A4-1B’s superior sound and performance consistency across the whole frequency spectrum. Accurate circuit topology meticulously recreates the architecture of the legendary Danish opto-tube design for truly authentic analog compression. This all-analog powerhouse was made to last and faithfully follow the legacy it was built upon.
Custom UK-made transformers
The custom input and output transformers give this compressor a tight, punchy low-end and beautifully detailed highs, adding warmth and character, bringing out rich harmonics without sacrificing clarity.
Hand-picked premium tubes
The signature sound of this unit comes from its premium tubes, giving it a rich, musical character, adding that unmistakable analog warmth while maintaining precision and clarity.
Revolutionized modern PSU
Electricity is the heart and soul of high-end analog gear so we added an efficient, modern PSU with advanced automatic voltage adaptation for greater stability and noise reduction, that also provides DC heating to the tubes for a smoother warm-up
Calibrated to perfection.
Among the many stand-out features of А4-1B are its calibration systems. A built-in Opto-Cell Test System ensures consistent compression and long-term reliability, even after decades of work. This automatic calibration shines the most when two units are used for stereo link or when you recall presets even years later. Choose between -10 dBu / 0 dBu / +4 dBu / +20 dBu for reference level and easily calibrate the VU meter – all accessed through the Calibration menu.
A4 – Antelope Audio Analog Automation
Unlock a game changing potential.
A4-1B is the first in a series of automated outboard analog units developed by Antelope Audio. We want to introduce high-quality audio hardware to the current generation of audio producers and artists. Thanks to our proprietary technologies these units can serve not only as traditional outboard analog gear, but also adapt to the dynamic pace of modern music production with remote control, instant setting recall, automation and more.
Supreme DAW control and automation.
The A4-1B plugin is available in VST3 / AU / AAX formats, compatible with any modern-day DAW and operating system. The unit is easily integrated into fully digital, all-analog, or hybrid studio setups. This intuitive tool makes preset management a breeze so you can apply your signature settings to various projects. Whether you A/B your mix or add a radical automation in the middle of a track – the A4-1B plugin delivers it straight to the hardware.
A new breed of motorized pots.
A4-1B features a ground-breaking proprietary motorized potentiometer engine. This not only solves the biggest downside of all analog hardware – fast preset recall for smoother workflow – but also grants convenient remote access while retaining the tactile experience of operating an outboard gear. The pots on the compressor are extremely responsive – any minor change on the digital panel is reflected immediately on the hardware, and vice versa. Modern engineers want quick, responsive, and accurate gear and that’s exactly what A4-1B achieves thanks to its custom motorized pots.
Built for the Antelope Community
The A4-1B plugin is available exclusively to our Synergy Core Native community members. With the purchase of the A4-1B, you receive one full year of access to the entire Synergy Core Native catalog of over 70 plugins, including new releases, updates, and cutting-edge audio tools.
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