Valve - 12AU7 Warm Boost Pedal
Valve - 12AU7 Warm Boost Pedal
Valve - 12AU7 Warm Boost Pedal
Valve - 12AU7 Warm Boost Pedal

Valve - 12AU7 Warm Boost Pedal

Regular price $129.00 $0.00

VALVE is an all-tube boost pedal (no silicon involved) operating in starved-plate and starved-heater mode, which is difficult to pull off. Most attempts (Matsumi) have marginal performance due to excess grid current at such low bias. This new design solves those issues, breathing life into the tube, achieving full bandwidth and low-noise performance, all while maintaining that gooey non-linear tube goodness. This pedal will fatten up your tone like nothing else. Destined to be your always-on pedal! Works great on bass too!


  • True bypass
  • 20dB gain
  • 12AU7 tube (included)
  • Level control
  • 100k ohm input impedance
  • 25Hz to 4kHz bandwidth
  • 9V @ 135mA power (up to 12V)




  • "I played the valve boost through both my bass and guitar. On bass, I can definitely hear the sound liven up with the additional harmonics. It also adds more of a growl than a drive, which is good thing for most bass styles. I do appreciate the lower fundamental not being cut off like most pedals do. For guitar, this thing is a game changer. I'm playing into a tube amp and this pedal increases the dynamics even that much more. It sings. It's become a part of the instrument as a whole. A keeper for both instruments for sure."
  • "I'm convinced that your starved voltage circuit works well, and sounds great. I'm only using it (so far) set at 9:00 (so not really distorting much) but it adds a nice crunch to the 12AX7s. The tube boost sounds great going in to my amp sims in the computer."