PV-1

Very clean, w/o distortion. Variable from 0 to Unity Gain, to +20db Boost (with the Boost Knob). Linear volume control, and noiseless throughout footpedal travel.

Works great, very dependable, solid unit, well made. Optical design eliminates need to replace scratchy pots.

Pretty straight-forward: A volume pedal utilizing an 'optical eye' Hall Effect (instead of using a potentiometer, similar to some Morley pedals) to vary the volume from zero to full, with a variable buffered preamp (unity gain to +20db boost).

No longer manufactured. Boss is kinda lame regarding support - they offer no end-user schematics. In fact, they insist a schematic no longer exists. However, for $35 they'll accept the pedal for repair(!?!). I acquired a copy of the schematic through a web-source.

This is the best volume pedal I've used, now that it's been mod'd. I've used PV-1s for El.Guitar and Bass, but prefer it for El.Flattop. It's quiet, has a nice travel, the buffer works great, and the boost is available to even-out differing instrument output levels (particularly if running a preamped pickup that lacks a volume control). Tough to beat!