I've had the SAME Morley volume pedal since 1985. I think they called it a "Black Gold". It has a 35db vol-boost button so you can solo at (don's cod-cockney accent) "11". One cleaning. Works great!!! I tried an Ernie Ball because it didn't need a power supply. After three weeks the Ernie Ball pedal was making scratching noises and so it's been unused since then.