Multi-effect pedal for bass. With over 70 effects and amp simulations, a looper, and an integrated rhythm section, the B1 Four takes your bass foundation to new heights. Additionally, you have access to countless effects for download from the expanded library in the Guitar Lab. Shape your personal sound with over 60 vintage and boutique effects such as octaver, bass synth, and fuzz. Create your stage sound with 9 classic amplifier and speaker simulations modeled after legendary amps from Fender, Ampeg, Aguilar, and others.