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Drunk Beaver Sumy Treble Booster pedal top view
Drunk Beaver Sumy Treble Booster pedal side view
Drunk Beaver Sumy Treble Booster pedal jacks view
Drunk Beaver Sumy Treble Booster pedal internals

Sumy Treble Booster

Classic Rangemaster reborn with NOS germanium and enhanced control



Sumy Treble Booster is our take on Rangemaster Treble Booster circuit. However, it's not just a clone but an improved version using NOS (new old stock) Germanium transistors and high-quality components with PU sim and adjustable frequency range.


  • Boost - boost level, about 24dB max.
  • Range - boosted frequency range, from fat boost to classic treble booster.
  • Impedance - controls the signal impedance when the pickup simulator is enabled, allowing you to adjust the interaction between your guitar and the pedal and fine-tune your tone.
  • PU Sim toggle - switches pickup simulator. When the PU Sim toggle is off, the buffer and impedance pot are also bypassed, giving you a classic effect that is sensitive to the input signal and any other pedals in your chain.
  • LED brightness trimmer - placed on the PCB trimmer allows you to adjust the status LED brightness.

Power supply

9V DC adapter (Boss-style negative center) not included. No batteries. They are bad for the environment 🌲.

Voltage: 9V

Current draw: 3.0 mA


FREE Worldwide shipping 🌏

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Lifetime Warranty - feel free to contact us if you have any troubles with a pedal!