Zoom B1 FOUR Electric Bass Effects ProcessorThe Zoom B1 Four is a multi effects processor designed for use with electric basses. Offered in an easy to use stompbox format, the B1 Four sports a wide selection of effects, amp emulations, and other features, such as an onboard 30 second looper and a chromatic tuner. With 68 built in rhythm patterns, you can add drum loops to the mix, which can be quite helpful during looping. Distortion, chorus, and more are all on hand, as are 9 bass amp models