Dunlop Announces the MXR M81 Bass Preamp Pedal

MXR M81 Bass PreampDunlop has expanded the MXR Bass Innovations series with the M81 Bass Preamp, a pedal that packs a preamp into a stompbox the size of the company’s Phase 90. Similar to a studio preamp, the Bass Preamp has level controls for its input and output. The EQ section has bass, mid, and treble controls with a sweepable midrange from 250Hz to 1kHz for further tweaking.

The Bass Preamp has a Direct Out with a pre/post EQ switch as well as a Ground Lift switch. Its circuitry is all analog and includes the company’s Constant Headroom Technology to maintain a clean tone. It comes with a factory preset to operate in buffered bypass with both the EQ and Direct Out section active, but players who only want to use the EQ section can flip an internal switch to disable the Direct Out to allow for true bypass operation.

The MXR M81 Bass Preamp pedal will be shipping May 6th with a street price around $169.
(Editor’s note: A previous version of this story stated the M81 was already shipping – it has been amended to reflect the updated shipping date of May 6.)

MXR M81 Bass Preamp Demo:

MXR M81 Bass Preamp Details:

Separate Input and Output Level Controls
3-band EQ with Sweepable Midrange
All Analog Circuitry
Direct Out with Pre/Post EQ and Ground Lift Switches

For more information:

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Share your thoughts

  1. Ah, they should’ve included the ‘colour’ button from the mxr m80+, great little feature

  2. I expected a higher street price…

  3. Does anyone know where it’s in stock online and can ship today?

  4. just get a tech21 and ignore everything else.

  5. +1 for Tech21. Though I’d love to play with this one too!

  6. I was thinking about adding this to my MXR M80? Would that make any sense?

  7. Rodrigo Vaz

    i don’t speak english but……i would like to know if a m-81 bass preamp is a direct bok too?

  8. Rodrigo Vaz

    a direct box….