Unleash the full potential of your bass guitar with the MXR M81 Bass Preamp Pedal. Packed into a compact and sleek Phase 90-sized box, this pedal offers a blend of pristine preamp and studio-quality Direct Out, ensuring your tone stays crystal clear without occupying too much space on your pedal board.

Whether you're looking to breathe new life into an old passive bass, add a touch of warmth to any amp, or dial in that perfect tone for a specific song, the M81 Bass Preamp has got you covered. With separate INPUT and OUTPUT level controls and a 3-band EQ section with sweepable midrange, you have extensive tonal flexibility at your fingertips. You can shape your sound precisely the way you want and send it straight to the house - pre or post-EQ - with the built-in Direct Out.

The true magic of the M81 lies in its Constant Headroom Technology, which ensures super clean delivery with high headroom. This innovative technology sets the M81 apart, giving you clarity at volumes other preamps can't match.

Key Features:

• Constant Headroom Technology for high headroom and super clean delivery
• Separate INPUT and OUTPUT level controls for maximum tonal flexibility
• 3-band EQ section with sweepable midrange (from 250hz to 1khz)
• Built-in Direct Out, switchable pre/post EQ
• GROUND LIFT switch to eliminate ground loop hum
• Factory preset to operate in ¼" out buffered bypass and Direct Out active
• Two internal switches to disable the Direct Out and ¼" out buffered bypass for true ¼" out bypass mode
• Operates on 9V battery, optional power supply, pedalboard power, or phantom power from your mixer
• Compact size, fitting neatly into any pedal board setup

Product specs

FAQs

What type of EQ controls does the MXR M81 Bass Preamp offer?

The MXR M81 Bass Preamp features a 3-band EQ with a mid-frequency control, allowing you to shape your bass tone with precision by adjusting the bass, mid, and treble frequencies.

Can the MXR M81 Bass Preamp be used as a DI box for recording?

Yes, the MXR M81 Bass Preamp includes an XLR DI output, making it suitable for direct recording or live sound applications, providing a clean and balanced signal.

Does the MXR M81 Bass Preamp work with both active and passive basses?

The MXR M81 Bass Preamp is compatible with both active and passive basses, offering flexible tone shaping and signal boosting for various bass guitar types.

What power supply does the MXR M81 Bass Preamp require?

The MXR M81 Bass Preamp requires a 9V DC power supply, which is sold separately, or it can be powered by a 9V battery for convenience.

How does the MXR M81 Bass Preamp handle bypass switching?

The MXR M81 Bass Preamp features true hardwire bypass switching, and it can be switched to a buffered bypass if desired, maintaining signal integrity in different setups.