Tube-Tech LCA2B - high-end 2-channel tube compressor/limiter with controls for each channel: output (-6dB to +10dB), ratio (1.6:1 to 20:1), threshold (off to -10dB), attack (0.3-70ms), release (0.07s to 2s), attack/release preset switch, manual/preset switch, link, compressor bypass, limiter bypass, limiter threshold, LED display for gain reduction. Superb, transparent sound for precise dynamic control or serious squashing.