Zoom B1X Four Bass Multi Effects Processor

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Zoom B1X Four Bass Multi Effects Processor
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Bass Multi-Effects Pedal

The Zoom B1X FOUR takes your low-end to new heights with over 70 effects and amp models, looper and a built-in rhythm section. Plus, access Guitar Lab’s additional library of downloadable effects.


- B1X FOUR offers 71 built-in effects
- 9 amp models for simulating classic rigs
- Up to 5 effects can be used simultaneously, chained together in any order
- Built-in expression pedal for control over any parameter
- Looper for recording up to 30 seconds / 64 beats of CD-quality audio with seamless start and end times
- Guitar Lab software for creating, editing and managing effects and patches
- 68 built-in rhythm patterns which can be used in conjunction with the Looper
- 50 memory locations for storing user-created patches
- Swap function makes patch organization a breeze
- Auto Save function for automatic saving of all patch parameters
- Pre Select function allows silent patch selection while the current patch remains operational
- Onboard chromatic tuner supports all standard bass guitar tunings, including low-B, high-C, and drop tunings
- Input jack accepts standard mono bass guitar cable (both active and passive instruments supported)
- Auxiliary input jack for connection of personal music players
- Output jack for connection to amp or headphones
- Backlit LCD with contrast control for easy viewing in low-light environments
- Lightweight and small enough to fit in your gig bag
- Easily integrated into any existing pedal board
- Runs on 4 AA batteries, with alkaline battery life of 18 hours
- USB port for firmware updates, power and connection to Guitar Lab
- Optional AC adapter

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X is for Xpression

For added control, the B1X FOUR features an expression pedal that can adjust effects, such as volume, wah, delay and pitch.


Beyond the Bass-ics

Craft your signature sound with more than 60 traditional and boutique effects, such as octaver, bass synth and fuzz.


Classic Amps

Recreate your on-stage sound with 9 classic amps and cabinets like Fender, Ampeg, Aguilar and more*.


*NOTE: Manufacturer names and product names are trademarks of their respective owners. The names are used only to illustrate sonic characteristics and do not indicate any affiliation with ZOOM.


You’ll Love Our Free Guitar Lab Software

Guitar Lab offers an endless world of artist patches, effects and more. And with its ability to manage and backup all of your patches, you can experiment with endless combinations.


Your New Rhythm Section

Play your bass to 68 different drum patterns! The B1 FOUR series offers a built-in drum machine with a variety of rhythm patterns in 4/4, 3/4 and more.


Loop Yourself In

Lay down a bassline up to 30 seconds, and then endlessly overdub your performance to build a dynamic, multi-part arrangement.


We’ve Got Your Back(up)

Turn on the auto save function and your patches and level settings will be instantly backed up as you create them.


Live Performing

Use either of 2 performance modes to seamlessly switch up patches and effects during live shows. PRESELECT mode lets you jump from patch to patch without affecting your current sound, while STOMP mode lets you turn individual effects on and off.


A More Hands-On Approach

Pick your pedal up off the floor for desktop use and easily dial in tones and settings to the exact levels you need.


Power Options

The B1X FOUR can operate with four AA batteries. You can also use an optional Zoom AD-16 AC adapter or run your pedal via USB bus power.

What’s in the Box


Here's what comes included with the B1X FOUR:


- Quick Guide

- AA size (LR6) battery x 4


Optional accessories:


- AC adapter (Zoom AD-16)




- Maximum number of simultaneous effects: 5

- User patches: 50

- Sampling frequency: 44.1 kHz

- A/D conversion: 24-bit, 128× oversampling

- D/A conversion: 24-bit, 128× oversampling

- Signal processing: 32−bit

- Display: 128x32 dot matrix LCD





- Standard mono phone jack

- Rated input level: -20 dBu

- Input impedance (line): 470 kΩ



- Stereo mini jack

- Rated input level: -10 dBu

- Input impedance (line): 1kΩ



- Standard stereo phone jack (combined line/headphone)

- Maximum output level: Line +2 dBu (10 kΩ or more output impedance)

- Headphones 17 mW + 17 mW (32Ω load)


- Input S/N: 120 dB

- Noise floor (residual noise): -97 dBu



- AC adapter: 9V DC 500mA center negative (ZOOM AD-16)

- 4 AA batteries (about 18 hours continuous operation time when using alkaline batteries with the LCD backlight off)




- Power can also be supplied through the USB port.

- When using a cable designed only for power, other USB functions cannot be used.


- External dimensions: 156 mm (D) × 216 mm (W) × 52 mm (H)

- Weight: 610 g (excluding batteries)


Note: 0 dBu = 0.775 V

Additional Information

Additional Information

Condition New
Manufacturer Zoom
Model B1XFour
Weight (kg) No
Weight (lbs) No
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