The Antelope Audio A4-1B is a state-of-the-art tube optical compressor that seamlessly blends the warm, rich tones of classic opto-valve compression with the precision and adaptability of modern digital integration, featuring a 100% purely analogue signal path, premium UK-designed transformers, high-quality tubes, an advanced opto-cell for precise compression, and cutting-edge remote control capabilities.

Authentic Analogue Engineering

The A4-1B embodies the essence of legendary tube compression, offering an all-analogue design that preserves the sonic character of classic audio equipment. Its meticulously crafted signal path employs high-end components, including custom UK transformers and a pre-sorted opto-cell, ensuring pristine sound quality and unmatched compression precision. With an all-tube push-pull amplifier at its core, the A4-1B delivers the warm, musical compression valued by professionals in music production, broadcasting, and post-production.

Innovative Features for Modern Workflows

Modern engineering enhances the A4-1B’s performance and reliability without compromising its analogue soul. Its advanced power supply includes automatic voltage adaptation for stable operation, while DC heating for the tubes reduces noise and enhances tonal warmth. A calibration system ensures consistent compression over time, maintaining precise stereo-link performance and delivering reliable results in professional audio settings. The inclusion of multiple reference levels for metering and a VU meter for monitoring input, compression, and output adds to its practicality for critical workflows.

Digital Precision Meets Analogue Warmth

Antelope Audio integrates cutting-edge technology to offer seamless compatibility with contemporary production environments. The A4-1B connects to the optional A4 software suite, allowing remote control through VST3, AAX, or AU plug-ins, as well as a standalone control app. This integration facilitates full DAW automation, with controls for attack, release, gain, threshold, and ratio accessible directly within the software. Motorised potentiometers on the hardware ensure instant synchronisation with digital settings, providing users with both tactile and remote control options for maximum flexibility.

Expanded Control and Filtering Options

The A4-1B includes a highly versatile filtering system to refine compression applications. Configurable high-pass, low-pass, and band-pass filters allow for precise sidechain processing, ideal for managing low-frequency content or targeting specific frequency ranges. A dedicated de-esser mode with a narrow band-pass filter offers exceptional precision when addressing sibilance in vocals or harshness in instruments, ensuring polished results in the final mix.

Comprehensive Software Suite

The optional A4 software suite extends the A4-1B’s capabilities, providing comprehensive remote control and workflow integration. Users can access automation, preset recall, and A/B testing through an intuitive interface that enhances consistency and efficiency in complex sessions. The software suite includes a full year of Antelope Membership, offering access to the Synergy Core Native plug-ins, along with updates and new releases, ensuring users stay at the forefront of innovation.

Unrivalled Precision and Sonic Excellence

The Antelope Audio A4-1B represents a perfect fusion of classic analogue craftsmanship and forward-thinking digital technology. Its robust construction, premium components, and advanced feature set make it an essential tool for professionals seeking the ultimate in audio compression. Whether in a high-pressure studio session or a critical live broadcast, the A4-1B ensures superior sonic performance, unparalleled precision, and seamless integration into any professional audio workflow.