Mark L Jazzy Boost


  • Level boost

Color Boost

  • German/Silicon/Mosfet (3 positon selector)


Mark L

MARK L JAZZY BOOST is a combination of three decades of sounds, beginning with the 60’s GERMAN boost, moving on the the 80’s style SILICON boost and finishing with the 90’s MOSFET boost. Each boost retains its unique character, thanks to which we receive a wide palette of sounds. This effects shows how JAZZ, BLUES and ROCK evolved over the years. With a three-position roatary COLOR-BOOST dial, we choose between:

  • GERMAN BOOST – a very characteristic tone, meaning: a lot of middle and boosted highs together with a delicately cut lower-end spectrum. Based upon the legendary AC128 transistor, this effect has a very characteristic ‘glass’ sound typical of GERMAN transistors.

  • SILICON BOOST – a circuit based on a silicon transistor BC-108, it neatly boosts the CLEAN channel.

  • MOSFET BOOST – amazing power, tremendous, deep and fat sound, together with 20db of clean boost, the sound becomes enormous with much more harmonics. This circuit does not include operational amplifiers and is solely powered by a class ‘A’ JFET circuit.


  • Level Out: Volume/Gain rotary dial
  • Color Tone: Rotary tone dial MOSFET, SILICON, GERMAN

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