normally if one runs a quiet signal into a pedal with higher gain, it will sound the same as running a loud signal into the same pedal with lower gain. This is somehow not true for the mxr distortion plus. I don't know why. Classical record with mildew sounds.
visit this site for much more info on the mxr distortion plus than you wanted worth noting: in 1981 the MXR company updated their pedals to have LEDs, these LED versions sell for much less than other vintage models because they look like the less desirable dunlop versions.
and then this pedal is the same schematic as distortion plus with an added tone knob.
