One embodiment of a rigid enclosure 101 with window or openings 102 so that an audio effect producing apparatus 130 approximately aligned to the openings is contained within and partially viewable to the operator. The enclosure is made of a rigid protective material and in an embodiment screens electromagnetic interference from the outside. The enclosure contains necessary hardware and additional openings to attach control electronics 114, knobs, switches 113, and pass-throughs for electrical signals such as power 112, input 110, and output 111 which can be located anywhere on the enclosure.