The EX-4 is a premium BOSS effects unit built for players who have run out of pedalboard space but haven't run out of ideas.

This is an effects focused unit designed to expand the possibilities of the pre-existing pedalboard. No amp sims, no cabinet sims – simply a library of 120 high-quality BOSS effects, covering every major category including a wealth of bass specific effects.

Run up to four effects at once, in any order, including multiple instances of the same effect.  All in the space of a single pedal.