Burl Audio BC5000 BIGFOOT Optical Compressor

The Burl Audio BC5000 Bigfoot is a mastering-grade 1U stereo optical compressor designed to deliver liquid smooth dynamic control, analog glue, and harmonic character. Combining a discrete Class-A signal path with custom Burl transformers and high-speed opto-attenuators, the BC5000 bridges the gap between classic LA-2A style musical levelling and modern, precision bus compression for tracking, mixing, and mastering.

Using Burl’s BX5 output transformers and direct-coupled Class-A discrete transistor topology, the BC5000 retains transient punch while thickening mid-range and controlling low end.

Equipped with a side chain high-pass filter, the BC5000 keeps mix bass tight and punchy. Its precision stereo-link mode guarantees phase accuracy and image stability across critical stereo mix bus and mastering duties.

Key Features

• Discrete Class-A Signal Path: Direct-coupled, zero-capacitor audio path for maximum dynamic response and high headroom.

• Custom Burl BX5 Output Transformers: Adds analog warmth, harmonic saturation, and deep low-end stability.

• High-Speed Opto Attenuator: Delivers classic optical leveling with flexible attack and release shaping for modern production workflows.

• Sidechain High-Pass Filter: Prevents sub-bass energy from over-triggering gain reduction.

• Stereo Link Mode: Ensures tracking accuracy across left/right channels during mix bus processing.

• Stepped Rotary Controls: Precision detented pots for exact level matching and instant recall in mastering environments.

• Heavy-Duty 1U Rackmount Chassis: USA-built steel enclosure designed for continuous commercial studio operation.

Technical Specifications

• Form Factor: 1U 19-Inch Rackmount Unit

• Channel Configuration: Stereo / Dual Mono

• Circuit Topology: Discrete Class-A Transistor Design

• Compressor Type: Optical (Opto-Attenuator)

• Output Transformers: Proprietary Burl Audio BX5

• Frequency Response: $10\text{ Hz}-100\text{ kHz}(\pm 0.1\text{ dB})$

• Maximum Input / Output Level: $+28\text{ dBu}$

• Sidechain Filter: Integrated High-Pass Filter

• Analog Inputs: 2x XLR Female (Balanced)

• Analog Outputs: 2x XLR Male (Balanced)

• Controls: Threshold, Ratio, Attack, Release, Makeup Gain, Sidechain HPF, Stereo Link, Hardwire Bypass

• Power Supply: Internal AC Power Supply