The DBX 166 is a two-channel noise-gated dynamics processor using the company's proprietary OverEasy compression technology.
The DBX 166 is is a one-space-high rackmount unit, with two channels which can be run in stereo or separately as dual-mono. It also has extra features such as gating, expansion, and peak limiting.
The controls for each channel of the old 166 include: threshold knob and fast/slow switch for the gate; threshold and ratio knobs for the compressor; threshold knob for the limiter; a switch to engage the sidechain control input; output gain knob, and bypass switch. There's one switch in between the two sides for linking them in stereo or separating them for dual mono operation.
The Gear Rack