Antelope Audio A4-1B Opto-Valve Analog Automated Compressor- Complete

Analog Compression with Digital Precision
The Antelope Audio A4-1B Analog Automated Opto Valve Compressor delivers the warmth and musicality of classic tube compression, enhanced with modern digital control. Its all-analog signal path, featuring premium tubes and custom UK-made transformers, ensures rich harmonic content and transparent dynamics. Designed for professional studios, the A4-1B excels in processing vocals, bass, keys, and percussion, maintaining clarity even under heavy compression.

Premium Components for Authentic Sound
At the core of the A4-1B lies a meticulously crafted analog circuit. High-quality tubes provide the characteristic warmth associated with vintage compressors, while custom UK-made transformers contribute to a tight low-end and detailed highs. The pre-sorted opto-cell ensures precise compression behavior, faithfully replicating the response of legendary optical compressors. This combination of components guarantees a superior sonic experience across the frequency spectrum.

Seamless Integration with Digital Workflows
Bridging the gap between analog and digital, the A4-1B features motorized potentiometers that allow for instant recall and automation of settings. Through the included A4 Analog Automation Control plugin, available in VST3, AU, and AAX formats, users can control parameters such as attack, release, gain, threshold, and ratio directly from their DAW. This integration facilitates a streamlined workflow, enabling quick adjustments and consistent settings across sessions.

Advanced Filtering and De-Essing Capabilities
The A4-1B offers an extended filter section, including high-pass, low-pass, and band-pass filters, allowing for targeted compression and sidechain applications. A dedicated de-essing mode, utilizing a narrow band-pass filter, effectively reduces sibilance in vocal recordings. These features provide engineers with precise tools to shape and control the dynamics of their audio material.

Automatic Calibration for Consistent Performance
To ensure long-term reliability and consistent performance, the A4-1B incorporates automated calibration systems. The Opto-Cell Test System and self-calibrating VU meters maintain accurate metering and stereo matching. Additionally, the power supply features automatic voltage adaptation and DC tube heating, enhancing stability and reducing noise, making the A4-1B a dependable choice for professional environments.