MXR MX-104 Distortion+

The MXR MX-104 Distortion + is a distortion (fuzz) effects pedal, designed & manufactured in the 1970s by MXR Innovations. The sound produced can be described as a mild fuzzy distortion, which made it popular.

Tony Banks used the MXR distortion pedal on his keyboards during the ...And Then There Were Three tour in 1978 and probably the Duke tour as well in 1980. However, he came to dislike the MXR fuzz and instead preferred the low quality sound from the Colorsound fuzz. In his view, he found the MXR distortion was "too good": "the better the [fuzz] box, the worse the keyboard sounds".