Mark Sampson was the brains behind both the Matchless and Bad Cat amp brands, so he has a prestigious legacy, to say the least. This is modeled after one of his amps, so it's a pre-amp with a built-in stereo tremolo/vibrato function. The pre-amp section is awesome, it functions as a killer always-on tone sculptor or booster. It'll dial in your amp+guitar combo to that ideal edge-of-breakup goodness, with a certain juicy thickness through the mids that's all class. The trem and vibrato are gorgeous too, it's gooey wobbly analog goodness that always just sounds 'right'. All in all: a quirky and fun combo, executed absolutely brilliantly.

Model: J. Rockett Audio Designs Mark Samson Revolver
Made: USA, recent model
Type: preamp/tremolo
Power: standard 9v negative supply (not included)
Switching: true bypass
Equivalent new street price (approx): $399aud
Mods: velcro added
Accessories: no box or manual
Condition notes: used, few minor marks. Overall: very good condition