The Zoom B1 Four is a bass multi-effects processor that delivers over 70 bass-optimized effects, amp models, and cabinet simulations in a compact, pedalboard-friendly format. From clean vintage tube tones to modern distortion, from subtle compression to lush chorus and delay, the B1 Four covers the full range of bass effects in a single unit.

Five footswitches give you hands-free control over your patches, and the built-in looper lets you layer parts for practice and creative experimentation. The rhythm machine provides drum patterns to play along with, making solo practice more engaging and productive. Battery operation means you can practice anywhere, and the compact size fits in any gig bag pocket. For bass players looking to explore effects without investing in a full pedalboard, the B1 Four is the smart starting point.