FD4 is a set of 4 different, parallel compressors in a single rack, each one with a totally different character and saturation. Inspired by a famous mixing technique, it provides multiple parallel compression, with sample accurate mixing between compressors and dry signal.

• Compressor 1: Smooth, even harmonics.
• Compressor 2: Transparent.
• Compressor 3: Fast, odd harmonics.
• Compressor 4: Brickwall limiter.

An optional multiband mode routes each compressor to a separate input/output.