Check the listing for details. Eventide Omnipressor Model 2830 Au Dynamics Processor. Listed at 1999.00 USD. The '70s-era Cult Classic Dynamics Processor Returns The original '70s-era Omnipressor is a cult classic among studio engineers. Only a few hundred of these multifaceted dynamics processors were built, and they can perform feats that few other studio compressors dare to attempt. Based on the coveted blackface unit, the Eventide Omnipressor Model 2830 Au is a spot-on reissue of this underrated classic, but with a few new tricks up its sleeve. The Au model boasts the same circuitry and sound as the original hardware unit, and it can faithfully replicate all its forerunner's exclusive dynamical shenanigans, including its trademark — and wildly unorthodox — dynamics processing, dynamic reversal, variable gating, expansion, compression, infinite compression, and limiting.