FX40 Equalizer

All four cosmetic variants of the FX40,
from late 1983, late 1984, early 1986, and early 1987 (left to right)

The FX40 Equalizer was a six-band graphic equalizer voiced for guitar (100-3200 Hz). The FX40 was one of the original ten DOD FX-series pedals that debuted in 1982, and remained in production until it was replaced by the FX40B in mid-1987.