Mendoza Maestro - Treble Booster



MAESTRO is a Treble Booster inspired by the legendary Dallas Rangemaster, widely used in the late ‘60s and early ‘70s.

Queen, Eric Clapton, John Mayall, Black Sabbath and many others have used it and it is still widely sought-after, becoming a very rare object.

The sound is characterized by germanium transistors (OC44 or equivalent) capable of reproducing a valvular sound and in the mean time it passes it on to the connected chain of effects.

It provides a boost on mid-range and treble tones that can add a layer of sweet distortion to the sound of the guitar.

The addition of dynamic control (MISCELA) mixes the sound, melting it with the sound features of your instrument amplifying the versatility and the possibilities of use.


  • Guadagno (Gain): manages the amount of harmonic pressure. The increasing of the Booster is very linear and interacts beautifully with the Mixture's settings.
  • Miscela (Mixture-Dynamics): adjusts the dynamic of the Booster in a largely progressive way, it interacts with every nuance of the guitar without mixing the harmonics, even in full chord.

Electrical Specifications:

  • Supply voltage: 9V (center - / + External)
  • Completely True Bypass
MAESTRO is capable of turning your sound into the one of the ‘60s' tube amp, a real "VINTAGE" sound, providing pressure to the sound of your guitar enhancing it with clear and full harmonics, increasing the dynamics.

It enhances crunch sounds without any noise, it’s perfect for both Blues and Rock at all levels.

It's very British.

Most recent forum threads

Where to find one?

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fx pedal stompbox stomp box guitar effects pedal treble booster high frequency booster treblebooster trebleboost high boost hi boost amplification amp amplifier volume/amplification
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