Vacuum tube buffer/boost pedal. Triode Pedals BEELZEBUB BOOST This is a very rare pedal. I bought it intending to connect it to the front end of a multi-effects unit, but I prefer the buffer pedal I already had, so I'm selling it. Vacuum tube pedals just don't suit me... There's crackling when you turn the Buzz knob. It doesn't occur if you don't move it, so it shouldn't affect your playing. It looks beat up, but that's the original finish, a relic-like acid etching by the manufacturer. Recommended for those looking for Lee Custom Amplifier or Beyond tube buffer. Made in the USA, this handmade vacuum tube pedal is of very high quality. I'm selling it very cheaply, so don't miss this opportunity. Here's the manufacturer's description: Handmade pedal from Baltimore, Maryland New retail price: ¥24,970 (tax included) A boost pedal that uses a vacuum tube. A "all-tube circuit" tube booster. The Sting knob creates a powerful clean boost, and raising the Buzz knob allows you to saturate the vacuum tube. The Queen-Drone switch allows you to focus the pedal's treble or bass range, and the Honey knob controls the overall tone. Controls: Buzz: Gain control. Adjusts the saturation of the vacuum tube. Sting: Volume control. Honey: Tone control. It works in the opposite direction of a typical tone control. Queen/Drone: Input filter. Queen = Treble, Drone = Bass mode.