Description
The MXR M89 Bass Overdrive is built to solve the classic bass-drive problem: how do you saturate the signal without losing the fundamental thump that anchors the mix. This pedal answers with a Clean blend control that lets you mix in a pre-EQ’d clean signal alongside the overdriven tone, so your low frequencies stay intact while the harmonics on top get gritty and alive.
Rather than a generic guitar drive stuffed into a bass box, the M89 is voiced from the ground up for low end. The Drive control pushes the circuit from mild tube-style warmth into thick, harmonically dense saturation, while Tone and Volume let you shape and match levels for seamless on/off transitions on a live board. Stack it after your compressor and before modulation or ambience for a burly midrange push that cuts through a dense mix without turning to mud.
Key features:
- Warm, harmonically rich, tube-like overdrive voiced for bass
- Clean control blends a pre-set EQ clean signal with the drive for punch without loss of low end
- Standard Volume, Tone, and Drive controls for dialing in gain stage and tonal balance
- True bypass preserves your signal path when the pedal is off
Juan Alderete of Racer X and The Mars Volta put it plainly: “Punch your bass into the mix with the help of the MXR Bass Overdrive.” Whether you’re after a subtle tube-amp push or a burly, saturated growl, the M89 keeps the low end where it belongs while giving you the grit to stand out.






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