Vox Valvenergy Silk Drive

I am fascinated by AIAB pedals and own many. This is perhaps the best. The bright switch is more than it appears, as it adds an aggressive upper mid focus that transforms the pedal from a beautiful controlled semi clean to a rock 'n' roll fire breather. IMO the nutube technology appears to yield real benefit: it provides a very smooth, touch-responsive transition into saturation, but beyond that has a subtle 'tube' feel going beyond FET-based distortion circuits and having less midrange transistor artifacts.

using as preamp for some reason