A manufacturer of synth equipment, based on California in the USA. Metasonix is notable for using vacuum tubes (valves) in most of its equipment; the tubes generally protrude out through the front of the panel, both as a stylistic element and to provide cooling. Further, the circuits are often based on tube types that were not originally intended for audio applications (i.e., not the common 12AX7), and most are new-old-stock rather than current production. Both the circuit designs and the marketing are rather iconoclastic, and tend towards distorted and inharmonic sounds.