FX40-B Equalizer

Six-band graphic EQ from DOD's 1980s FX series for boosting or cutting across the guitar's range.

The FX40-B Equalizer is a six-band graphic EQ from DOD's 1980s FX series, with sliders spanning the guitar's frequency range.

Each band boosts or cuts a fixed frequency, letting it work as a tone shaper, a solo boost, a way to tame problem frequencies or a means to voice a fuzz or amp differently. Simple and effective, it was a staple of the classic DOD lineup. Now long discontinued, it turns up regularly on the used market as an affordable vintage EQ.