EXP is the combined equalizer that has three unique functions in one unit. First is the frequency expander, second is a mid-band peak control and third is a flat booster. Another great feature of EXP / EX3 is unlikely conventional Bass / Middle / Treble Equalizer system that change over all gain while control the frequency character, the EXP / EX3 is designed to keep the over all gain constantly that provides operation stability while you are playing your guitar on the stage.
Choose whether you want to have a full mid-range or accentuated high and low frequency for your excellent performance.

EXP / EX3 works with passive, active pickup and bass guitars.
Only small amount of current drain (0.16 mA) required that means your 9V battery will last long for years
(more than 4000 hours in continuous use. - workable voltage : drop down to 5 V).