2 mic/line pre-amps with variable gain, 48V phantom power, filters and phase reverse Instrument tube pre-amp with variable gain, EQ, phase reverse and brightness boost 2 soft-knee tube compressors with variable threshold, attack, release and output gain True stereo link operation with BIGposition for retaining bass frequencies Side chain access and side chain listen facility VU metering of gain reduction and output levels Individual +4dB/-10dB inserts Balanced +4dB XLR input/output connectors