F-Stop Color:Black Tone is unreal - best

Tone is unreal - best thing I've ever played - crystal clear

but the guitar signal path and tremolo circuit is 100% analog

and also increases headroom so that The Amp 100 can still work well with external drive and boost pedals

This amp is meaner and screamier than most amps double its size

F-Stop Color:Black Tone is unreal - bestOne stop for timeless amplifier effects ABOUT The F Stop brings two effects found in vintage American tube amplifiers into one pedal. The combination of a tube driven spring reverb with pulsating "bias" tremolo was first introduced in the early 1960s and has become a standard sound for guitar players and other instrumentalists ever since. The F Stop has been designed to bring classic tube amplifier effects into a small package that runs off of a 9VDC