The MXR M281 Thump is an MXR preamp pedal, currently around $138.55. Close alternatives include the Walrus Audio EB-10B and the Ampeg F17-1. It pairs well with the Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator and the Ashdown Velvet Compressor.
MXR M281 Thump
MXR · pedal
The MXR M281 Thump is a bass preamp pedal offering active tone shaping, boost, and blend controls designed to give bassists precise tonal control and added punch. Built with MXR's rugged construction standards, it targets bassists wanting a dedicated preamp pedal to shape and enhance their tone beyond what their amp's built-in controls provide.
What stands out
“Primary use case is bassists wanting to sculpt their tone with active EQ and add volume boost for solos or cutting through a mix”
— from the community notes
“the mxr m281 thump is a bass preamp pedal offering active tone shaping”
— from the listing
“Active preamp circuitry provides genuine tonal shaping power, letting bassists sculpt their sound independent of their amp's built-in EQ”
— from the reviews
“Standout strength is the active preamp circuitry itself, giving bassists genuine tonal shaping power in pedal format”
— from the community notes
“Part of MXR's dedicated bass effects lineup, extending the brand's pedal-building expertise into bass-specific applications”
— from the community notes
- boost
- eq
- mix
- rugged
- active tone
- punch
- road worthy
Good for
- Live
- Silent Recording
- Silent Stage
- Studio
Price updated Oct 24, 2026
Pedals that stack with the MXR M281 Thump
Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator
pedal
24% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator after MXR M281 Thump in the signal chain, clear of MXR M281 Thump's own gain stage
Comes earlier in the signal chain
Ashdown Velvet Compressor
Ashdown
20% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
Ashdown Velvet Compressor leans toward compressed, and that's a real, usable character to pair with
Comes earlier in the signal chain
Greer Mizuki blue
Greer
19% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)
Greer Mizuki blue leans warm right where the bright tone needs it
Comes earlier in the signal chain
Catalinbread SFT
Catalinbread
19% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)
Where this leans bright, Catalinbread SFT answers back warm
Comes earlier in the signal chain
Walrus Audio Fable
Walrus Audio
19% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Run Walrus Audio Fable after MXR M281 Thump in the signal chain, clear of MXR M281 Thump's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Line 6 DL4 Delay Modeler
pedal
15% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep MXR M281 Thump's bright voice out front: Line 6 DL4 Delay Modeler goes after MXR M281 Thump in the signal chain so its warm voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
SolidGoldFX Commodore Breaker Overdrive
Solidgoldfx
tonal matchComes earlier in the signal chain
SolidGoldFX Commodore Breaker Overdrive's smooth balances out the bright tone
Dunlop Blue Hippo Optical Tremolo
Dunlop
tonal matchComes earlier in the signal chain
Dunlop Blue Hippo Optical Tremolo leans warm right where the bright tone needs it
Cheaper alternatives
Demon FX AG Bass Preamp
Demon Fx
54% similarityShared character: brand
AnalogWorkshop Jaguar Bass Preamp
Analogworkshop
47% similaritySimilar role and voicing
Ampeg Classic Analog Bass Preamp
Ampeg
47% similaritySimilar role and voicing
Electro-Harmonix Nano Operation Overlord
Electro-Harmonix
40% similarityShared character: mix, boost
Similar character
See all alternatives to the MXR M281 Thump (cheaper + boutique) →
Questions people ask
What are good alternatives to the MXR M281 Thump?+
The closest matches in character are the Walrus Audio EB-10B, the Ampeg F17-1, the EarthQuaker Devices Scrolls V1. Budget picks: Demon FX AG Bass Preamp, AnalogWorkshop Jaguar Bass Preamp, Ampeg Classic Analog Bass Preamp.
What pairs well with the MXR M281 Thump?+
Strong matches from rig and tone-complementarity evidence: Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator, Ashdown Velvet Compressor, Greer Mizuki blue — Keep Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator after MXR M281 Thump in the signal chain, clear of MXR M281 Thump's own gain stage.
How much does the MXR M281 Thump cost?+
Around $138.55 (live listing price, updated Oct 24, 2026).