Mad Professor Golden Cello Delay/Drive - UsedThis Mad Professor Golden Cello Delay Drive is in mint condition and has velcro on the back. The Golden Cello by Mad Professor makes you feel like you're in a sold out stadium playing to thousands of screaming fans. It is a two in one delay, and overdrive pedal that delivers lush overdriven tone with tape echo delay. The Golden Cello has four knobs: Delay, Drive, Volume, and Tone. Inside the pedal are two trim pots that allow you to adjust the delay