Symetrix 425 2-Channel Audio Compressor


The 425 is a straightforward 2-channel VCA compressor. Each channel has an expander, compressor & limiter and the sidechain for each channel has an insert via a TRS jack. This enables the sidechain to be EQd, or otherwise modified, to change the response of the dynamic control.

Attack times are program-dependent and release times are variable via the front-panel controls. Compression ratio and threshold are variable and the expander and limiter both have a variable threshold. The expander is a true downward expander, not a noise gate, so is suitable for all signals.


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