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Zoom B2 Four Amplifier and FX Emulator Pedal

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  • IR and DI Modeling for Electric Bass
  • Six Iconic DI Models, Multi-Layer IR
  • 104 Effects, 5 Simultaneous Effects
  • 250 Presets, 300 User Patches
  • 24-Bit A/D & D/A Conversion, 32-Bit DSP
  • 60-Second Looper and Rhythm Machine
  • Balanced XLR Out, Ground-Lift Switch
  • 1/4" I/O, 3.5mm Aux In & Headphones Out
  • Selectable Input Impedance
  • USB-C Connectivity, Bus, or AC Power

The Zoom B2 Four Amplifier and FX Emulator Pedal sounds like an impressive piece of equipment for bass players looking to expand their sound and explore new sonic possibilities. With six iconic DI models and 104 comprehensive effects, the pedal offers a wide range of amp, preamp, and effect models to choose from. The ability to layer up to five simultaneous effects allows for unique and complex patches that can help players stand out from the crowd.

The high-quality 24-bit A/D and D/A conversion, including 128x oversampling, and 32-bit DSP for high-resolution effects ensure that the B2 Four delivers pristine sound quality. The balanced XLR output with ground-lift switch helps eliminate noise, while the 1/4" input with selectable impedance and 3.5mm aux input provide plenty of connectivity options.

The Zoom B2 Four Amplifier and FX Emulator Pedal also features a powerful headphone output, expression control input, and USB-C connectivity, which allows for using the B2 Four as a 2x2 audio interface and connection to the patch- and effect-expanding Handy Guitar Lab for B2 Four iOS app. With 250 presets and 300 user patches, the B2 Four is a versatile and customizable tool that can help bass players unlock the full potential of their instruments. Overall, the B2 Four Amplifier and FX Emulator Pedal from Zoom seems like a powerful and feature-packed option for bass players looking to enhance their sound and explore new sonic possibilities.

In the Box
  • Zoom B2 Four Amplifier and FX Emulator Pedal
  • Power Adapter
  • Limited 1-Year Manufacturer Warranty
More Information
Product ConditonNew


User Memory 300 Patches
A/D and D/A Conversion 24-Bit (128x Oversampling)
Digital Signal Processing (DSP) 32-Bit
Maximum Headphone Output Level 66 mW into 32 Ohm Load (33 mW per Channel)
S/N 124 dB
Noise Floor Left/Right and Headphones: -96 dBu Balanced Output: -100 dBu


Panel Type LCD
Resolution 256 x 128
Touchscreen No

Inputs / Outputs

USB I/O 1 x USB-C 2.0 Female Input/Output
Audio I/O 1 x XLR 3-Pin Line Output 2 x 1/4" TS Line Output (1 Stereo Pair) 1 x 1/8" / 3.5 mm TRS Headphone Output 1 x 1/4" TS Hi-Z/Instrument/Line Input (Selectable Impedance: 1 or 10 Megohms) 1 x 1/8" / 3.5 mm TRS Aux Input 1 x 1/4" TRS Hi-Z/Instrument Input (Expression Pedal)


Mobile App Compatible Yes, Adapter Required (Not Included): iOS Only App Name: Handy Guitar Lab for B2 Four Functionality: Access Stored Files, Firmware Update *As of February, 2023: Check with manufacturer for the most up-to-date compatibility


Power Source AC Adapter with Power Brick (Included), USB (Not Included)
AC Input Power 100 to 240 VAC, 50 / 60 Hz
DC Input Power 9 VDC at 500 mA


Color Black
Dimensions 9.8 x 5.7 x 2.8" / 24.9 x 14.6 x 7.2 cm
Weight 32 oz / 906 g
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to
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