The MXR M81 is a Bass preamp pedal that has a studio quality direct out in one small package. The M81 features a separate input and output level controls and a 3 band EQ section with a sweepable midrange from 250hz to 1kHz for maximum tonal flexibility. It’s all delivered super clean with high headroom thanks to MXR's own 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.