B1 Four

The Zoom B1 Four is a bass multi-effects processor that offers a wide range of features and functionalities. Here are the technical specifications and details:

- Pedal Type: Bass Multi-FX, Modeling
- Number of Effects: Over 60 (up to 5 simultaneous)
- Built-in Rhythm Patterns: 68
- Maximum Number of Simultaneous Effects: 5
- User Patches: 50
- Sampling Frequency: 44.1 kHz
- AD/DA Conversion: 24-Bit, 128x Oversampling
- Signal Processing: 32-Bit, Internal
- Display: 128 x 32 Dot Matrix LCD
- Input Level: 1/4" Instrument: -20 dBu, 3.5 mm Auxiliary: -10 dBu
- Input Impedance: 1/4" Instrument: 470 kOhms, 3.5 mm Auxiliary: 1 kOhm
- Power Options: Operates with four AA batteries, optional Zoom AD-16 AC adapter, or via USB bus power

Features:
- Over 60 built-in effects including octaver, bass synth, and fuzz
- 9 amp models for simulating classic rigs such as Fender, Ampeg, and Aguilar
- Built-in drum machine with 68 rhythm patterns in 4/4, 3/4, and more
- Looping function allowing up to 30 seconds of recording and overdubbing
- Auto save function for instant backup of patches and level settings
- 2 performance modes for seamless patch and effect switching during live shows
- Expression pedal for adjusting effects like volume, wah, delay, and pitch
- Compatible with Zoom Guitar Lab software for patch management and experimentation

The B1 Four by Zoom is designed to cater to the diverse needs of bass players, offering a comprehensive set of effects, amp models, rhythm patterns, and performance features in a compact and versatile package.