Introduction
This manual provides comprehensive instructions for the safe and effective use of your Zoom B1Xon Bass Multi-Effects Processor. The B1Xon is a compact multi-effects processor designed for bass guitar, featuring a wide array of effects, a looper, rhythm patterns, and a built-in tuner. It is suitable for practice, recording, and live performance.
Safety Information
- Do not expose the unit to rain or moisture.
- Avoid placing the unit near heat sources or in direct sunlight.
- Use only the specified power adapter (optional) or batteries.
- Do not attempt to disassemble or modify the unit. Refer all servicing to qualified personnel.
- Keep out of reach of children.
Package Contents
Please check that your package contains the following items:
- Zoom B1Xon Multi-Effects Processor
- AA Batteries (x4)
- User Manual (this document)
If any items are missing or damaged, please contact your retailer.
Controls and Functions
Familiarize yourself with the various controls and connectors on your B1Xon unit.

Figure 1: Front view of the Zoom B1Xon, showing the LCD display, control knobs, navigation buttons, and four footswitches, including an expression pedal on the right.
Front Panel Controls:
- LCD Display: Shows patch names, effect parameters, and menu options.
- Navigation Buttons (UP/DOWN/LEFT/RIGHT): Used to select patches and navigate menus.
- ENTER Button: Confirms selections.
- MENU Button: Accesses the main menu for editing effects and settings.
- HOME Button: Returns to the main patch display.
- Control Knobs: Adjust effect parameters displayed on the LCD.
- Footswitches (REC/PLAY, STOP/CLEAR): Control the looper and rhythm functions.
- Expression Pedal: Controls various parameters such as volume, wah, or effect levels.
Rear Panel Connections:

Figure 2: Rear view of the Zoom B1Xon, showing the input jack, AUX IN jack, OUTPUT jack, USB port, and DC 9V IN power input.
- INPUT Jack: Connect your bass guitar here.
- AUX IN Jack: Connect an external audio player (e.g., MP3 player) for jamming.
- OUTPUT Jack: Connect to your amplifier, mixer, or headphones.
- USB Port: For firmware updates and connecting to a computer (not for audio streaming).
- DC 9V IN: Connect an optional AC adapter (Zoom AD-16 recommended).
Setup
Powering the Unit:
The B1Xon can be powered by four AA batteries or an optional AC adapter (Zoom AD-16).
- Using Batteries: Open the battery compartment on the bottom of the unit and insert four AA batteries, observing the correct polarity.
- Using an AC Adapter: Connect the AC adapter to the DC 9V IN jack on the rear panel and plug it into a wall outlet.
Connecting Your Equipment:
- Connect your bass guitar to the INPUT jack.
- Connect the OUTPUT jack to your bass amplifier, mixer, or headphones.
- If desired, connect an external audio player to the AUX IN jack.
Operating Instructions
Turning On/Off:
To turn on the unit, press and hold the HOME button. To turn off, press and hold the HOME button again until the display turns off.
Selecting Patches:
The B1Xon stores effects settings as "patches."
- In Play mode, use the UP/DOWN navigation buttons to scroll through patches.
- Press the footswitches to quickly switch between patches in a bank.
Using the Tuner:
The B1Xon includes a chromatic tuner.
- To activate the tuner, simultaneously press the two lower footswitches (REC/PLAY and STOP/CLEAR).
- Play a single note on your bass. The display will show the note name and indicate if it is sharp or flat.
- Adjust your tuning until the display indicates the note is in tune.
- Press any footswitch or the HOME button to exit the tuner.
Using the Looper:
The looper allows you to record and overdub up to 30 seconds of audio.
- Press the REC/PLAY footswitch once to start recording.
- Press the REC/PLAY footswitch again to stop recording and start playback.
- To overdub, press the REC/PLAY footswitch during playback.
- To stop playback, press the STOP/CLEAR footswitch.
- To clear the recorded loop, press and hold the STOP/CLEAR footswitch.
Using Rhythm Patterns:
The B1Xon features 68 built-in rhythm patterns for practice.
- Access the Rhythm function through the MENU.
- Select a rhythm pattern and adjust its tempo and volume.
- Press the REC/PLAY footswitch to start/stop the rhythm.
Editing Effects and Saving Patches:
The B1Xon allows you to customize effects and save them as user patches.
- Select the patch you wish to edit.
- Press the MENU button to enter the effect chain view.
- Use the navigation buttons to select an effect block.
- Use the control knobs to adjust the parameters of the selected effect.
- To save your changes, press the MENU button again, navigate to "SAVE," and press ENTER. Choose a destination patch number and confirm.
Maintenance
- Cleaning: Wipe the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: If using batteries, replace all four AA batteries when the low battery indicator appears on the display. Always replace with new batteries of the same type.
- Storage: When not in use for extended periods, remove the batteries to prevent leakage. Store the unit in a cool, dry place.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound | Incorrect connections, low volume, dead batteries. | Check all cable connections. Increase volume on the B1Xon and your amplifier. Replace batteries or use an AC adapter. |
| Unit does not power on | Dead batteries, AC adapter not connected or faulty. | Replace batteries. Ensure AC adapter is securely connected and functional. |
| Distorted or noisy sound | Input level too high, faulty cables, interference. | Reduce the input level on the B1Xon. Try different cables. Move away from sources of electrical interference. |
| Expression pedal not working | Pedal assignment incorrect, calibration needed. | Check the effect parameters to ensure the expression pedal is assigned to a function. Refer to the full manual for calibration instructions if necessary. |
Specifications
- Effect Types: Over 75
- Simultaneous Effects: Up to 5
- Patch Memory: 100 (10 banks of 10)
- Looper: 30 seconds recording time
- Rhythm Patterns: 68
- Tuner: Chromatic
- Input: Standard mono phone jack
- Output: Standard stereo phone jack (can be used as mono/stereo line or headphone output)
- AUX IN: Stereo mini jack
- USB: For firmware updates
- Power: AC adapter (DC 9V, 500mA, center negative, Zoom AD-16) or 4 x AA batteries
- Battery Life: Approximately 20 hours (with alkaline batteries)
- Dimensions: 10.08 x 7.52 x 2.48 inches (approximate, from package dimensions)
- Weight: 2.13 pounds (0.97 kg)
Warranty and Support
For warranty information and customer support, please refer to the warranty card included with your product or visit the official Zoom website. Keep your purchase receipt as proof of purchase.
Online Resources:
- For the latest firmware updates and additional resources, visit the Zoom official website.





