Dunlop M81 MXR® Bass Preamp
The MXR Bass Preamp combines a pristine bass preamp with a studio-quality Direct Out in a Phase 90-sized box, providing clear tone without hogging precious pedalboard space. Use it to add a new voice to an old passive bass, sweeten up any amp, or put some special sauce on a particular song. Dial it in just the way you want it and send it straight to the house-pre or post-EQ-with the built-in Direct Out.
The Bass Preamp features separate Input and Output level controls and a 3-band EQ section with sweepable midrange-from 250hz to 1khz-for extensive tonal flexibility. It's all delivered super clean with high headroom thanks to MXR's Constant Headroom Technology™ , and you can use the PRE/POST EQ switch to set whether or not your Direct Out signal is affected by the Bass Preamp's EQ section. And of course, the Bass Preamp features a GROUND LIFT switch in case you encounter ground loop hum.
The Bass Preamp is factory preset to operate in ¼" out buffered bypass and Direct Out active. For players who only want to use the ¼" out, there are two internal switches that disable the Direct Out and ¼" out buffered bypass for true ¼" out bypass mode.
- Switchable pre/post EQ direct out - get the right tone for your amp and the room
- High headroom input and output level controls for distortion-free signal
- 3-band EQ section with sweepable midrange dials in whatever you need
- Buffered bypass/True bypass switchable for even greater versatility
- Operates on 9V battery, optional power supply, pedalboard power, or phantom power from your mixer
Build out your board
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Our in-store repair shop can set this up before it leaves – string gauge, action, intonation and tuning, done to how you play. Already own one? Book a setup anytime.
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Granata Music Roydon
43 Roydon Place, Unit 4, Ottawa, ON
Mon–Fri 10–8 · Sat 10–7 · Sun 12–5
















