The Mad Professor Ruby Red is a wonderfully transparent, musical booster that excels at pushing a good amp into natural breakup while preserving your core tone. This one is fully functional and sounds exactly as it should — no issues whatsoever. Cosmetically, it shows significant road wear and is missing one chassis screw, so it’s priced accordingly. No original box.

A great workhorse pedal at a honest price. Local Bay Area pickup welcome; happy to ship