“The rare Westbury W-20 tube powered overdrive.
It goes from an excellent moderate overdrive to full on tube drive. It
uses an AC high voltage driven 12AX7 and just destroys all the starved
plate design tube pedals.”
“Great tone, from mild to warm, to flat out killer
overdrive. Like all tube amps the 12ax7 tube will need to be replaced
after a while, and the thing just perks up to that nice warm overdrive
again. AC powered to get the tube good and warm so it can do its thing.“