The Rockruepel COMP.TWO Mastering Bus Compressor is an all-tube (valve), stereo/dual mono variable-mu compressor design which, aside from being a unit which by only passing signal through it makes a marked and very pleasing improvement upon the sound, but also holds the unique distinction of being the fastest variable-mu design to date. The benefit of this ultra-fast attack and fast release time is that it allows you hone right in on the leading transient, compress it, and then let off fast enough not to affect the remainder of the waveform. So, it is a true mastering tool for precise compression duties where the goal might be to retain all of the available dynamic range.

But that's not to say that the Rockruepel COMP.TWO isn't a "vibe box"; it most certainly is, and can add all sorts of funky - but somehow still refined and usable - flavor when pushed hard in only the way that a premium quality compressor can. So, the COMP.TWO is not just for mastering; it's equally at home in the tracking and mixing studio. The combination of both variable resistor controls for Input, Output, and Threshold and stepped-switches for Attack and Release allows for maximum user precision when dialing in on the program material to be compressed. This configuration has worked very well for mastering engineers throughout Europe for some time now.

Three separate low-cut / high-pass side-chain settings (6dB/oct @ 54Hz, 74Hz, and 110Hz) give you ample choices to avoid bass or kick drum signals (low frequency) alone from triggering the compressor, resulting in a more powerful mix.