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Used MXR Thump Bass Preamp Pedal
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MXR Thump Bass Preamp Pedal

Bass Preamp Pedal with 3-band EQ, Adjustable Mid Frequency, and Output Control
$149.99

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An Echoplex Pre for Your Bass

Guitarists have been using the Echoplex’s preamp to juice their tone for ages, and now — thanks to the MXR Thump — bassists can get in on the action. Besides injecting your playing with the natural mojo of its circuitry, this bass preamp pedal also supplies you with a 3-band EQ with an adjustable mid frequency. Whether you want to punch up a solo, boost your live signal, or give your passive pickups an aggressive edge, the MXR Thump is the tone-sweetening, signal-boosting, groove-enhancing secret sauce you’ve been searching for.

Tons of tone-shaping power onboard

Just running your bass signal through the MXR Thump conditions it with a carefully balanced EQ profile, but that’s just the beginning. This bass preamp pedal’s 3-band EQ enables you to sculpt your tone in a myriad of ways. The Bass knob dials in your sound around the 40Hz range, while the Treb knob adjusts 8kHz. The Freq control enables you to adjust the frequency of the Mid knob, from 250Hz to 1kHz. The bassists here at Sweetwater love the flexibility of the Thump — it packs a lot of versatility into an MXR mini housing.

MXR Thump Bass Preamp Pedal Features:

  • Echoplex preamp that’s tailored to bass guitar
  • 3-band EQ enables you to tweak 40Hz and 8kHz
  • Midrange is adjustable from 250Hz to 1kHz for maximum tonal flexibility
  • Great for punching up solos, boosting your live signal, and adding an aggressive edge to passive pickups

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Tech Specs

  • Pedal Type: Preamp, Boost
  • Analog/Digital: Analog
  • Inputs: 1 x 1/4"
  • Outputs: 1 x 1/4"
  • Bypass Switching: True Hardwire
  • Power Source: 9V DC power supply (sold separately)
  • Power Usage: 9mA
  • Height: 1.62"
  • Width: 2.12"
  • Depth: 3.62"
  • Weight: 0.43 lbs.
  • Manufacturer Part Number: M281

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Customer Reviews

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Rated 5/5

Mxr Bass Thump

I use this pedal to add more variety to passive basses tone knpbs. Works well for that application. Built sturdy, and extremely small. Works as it should.
Rated 1/5

Clips

To match the volume to the bypass signal you got to crank up the drive and it clips. The overall tone is mediocre but the clipping is the biggest issues.
Music background: Bass player
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