---
product_id: 105200324
title: "B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered"
brand: "zoom"
price: "€ 249.06"
currency: EUR
in_stock: true
reviews_count: 13
category: "Zoom"
url: https://www.desertcart.at/products/105200324-b1x-four-bass-multi-effects-processor-with-expression-pedal-70
store_origin: AT
region: Austria
---

# Expression pedal for dynamic control Battery powered for ultimate portability 71 built-in bass effects & 9 amp models B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered

**Brand:** zoom
**Price:** € 249.06
**Availability:** ✅ In Stock

## Summary

> 🎸 Own the Stage with Every Note — Your Bass, Your Rules!

## Quick Answers

- **What is this?** B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered by zoom
- **How much does it cost?** € 249.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/105200324-b1x-four-bass-multi-effects-processor-with-expression-pedal-70)

## Best For

- zoom enthusiasts

## Why This Product

- Trusted zoom brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Loop, Jam & Groove Instantly:** Create, layer, and loop riffs on the fly with the 30-second looper and built-in rhythm patterns—practice or perform like a pro.
- • **Plug & Play Anywhere, Anytime:** Battery-powered design with USB connectivity means you’re ready to rock without being tethered to outlets or bulky gear.
- • **Unleash 71+ Pro-Grade Effects:** Dive into a vast palette of bass tones and amp models that elevate your sound beyond the ordinary.
- • **Express Yourself with Pedal Control:** Seamlessly manipulate select effects in real-time using the built-in expression pedal—your secret weapon on stage.
- • **Customize & Expand Your Sound Library:** Access Zoom Guitar Lab software to download and tweak effects, making your pedalboard truly one-of-a-kind.

## Overview

The Zoom B1X FOUR is a compact, battery-powered bass multi-effects processor featuring over 70 built-in effects, 9 amp models, a 30-second looper, and a built-in rhythm section. Its expression pedal offers real-time control, while USB connectivity allows for easy effect downloads and customization via Zoom Guitar Lab software. Lightweight and portable, it’s designed for bassists seeking versatile tone-shaping and performance tools on the go.

## Description

The Zoom B1X FOUR puts your bass front and center with over 70 effects and amp models, Looper and a built-in rhythm section. Plus, Access Zoom guitar Lab’s library of downloadable effects. And for added control over select effects, The B1X FOUR features Zoom’s expression pedal.

Review: Great Little Machine! - Whoa, if you want some superior bang for your FX pedal bucks, this Zoom B1-4 is the deal of the century! I'm NOT exaggerating. This little jewel is undoubtedly the BEST bass effects pedal I've ever owned or played with. It has everything you'll need, including amp modelling, outstanding compression--the "Glam Comp" setting delivers jaw-dropping sustain, the likes of which I've NEVER heard before--an auto-wah that is a blast to play with, all sorts of nifty filter variations, and even some classic amp tone models right out of the history books. When I first plugged it in and started messing with it, I was astonished by this unit's range and versatility. I could get nearly any tone or amp sound, any kind of filter effect I wanted. It's ridiculously simple to use and has an open, "blank" bank in it that allows you to copy an effect from a different bank into an open slot. It's stupid-easy to set up a series of presets in linear order in the blank bank so that just a touch of your toe cycles quickly to the effect you want. I set mine up with the auto-wah first, then the "hard comp," followed by the "glam comp," with an Ampeg SVT amp model, then a vintage Fender cabinet, leaving four more slots open if I want to add something else, simply by copying the desired patch--a three click operation--into any of the remaining slots. Make a mistake? Easy-peasy: delete it and do it again. Takes less than a minute to reprogram it. Not satisfied with the internal patches? No prob; the unit lets you tweak the parameters to suit your own ears. I didn't get into that; I really liked what I heard. Zoom's engineers really put some serious thought and research into this. There are only two drawbacks: it's made of a relatively lightweight plastic, not aluminum or steel, so it's a wee bit fragile. DON'T drop it! I suggest buying the carrier case that's available. I'm glad I did. It's a hardshell case and protects the unit really well. The other drawback is that some of the patches are a bit...well, WEIRD. One of them is labelled "Explosion." I tried it. Yes, it sounds like someone set off a nuke in the next county. Or a really mean thunderstorm. I dunno, you metal players might find a use for it--but a few oddball patches that I'll never use does not mean a deal-breaker. The price will make your jaw drop, too: around $90. (Zoom might increase the price later. I'm astounded that it's THIS inexpensive.) Shipping will add a bit more and if you get the case, you're looking at a total of around $125 for both. Yes, it comes with a wall-wart that has a nice long cord. All told, the Zoom B1-4 is about HALF the price of a comparable steel or aluminum sheathed unit from any other manufacturer--and it does five times the job. It's clean and quiet enough for recording. Onstage, it sounds frickin' AWESOME. I kick the glam comp on when I hit a low E at the end of a tune and that note will sustain for several minutes. I do NOT exaggerate! No foolin', this is the deal of the century. It's now the ONLY pedal I use onstage for my bass (a Squire Affinity series J-bass with active electronics which is itself an awesome machine.) and I can't see myself using anything else for some time to come. Warning: it will peg the meters on the sound board if you don't give the engineer a heads-up during the sound check. I'm serious. This little beast is POWERFUL.
Review: Better than I thought! - I play bass for the all pro band Rat Soup so quality sound is a high priority. I typically don't use effects and have always wanted to try them so I purchased this unit. I was not disappointed. A pure signal chain is important to me so I wanted a clean bypass. The bypass signal is very close to the original. So it's not so big of a loss in a live performance, but I would not record with it. As far as tones, there are some great ones and they sound pretty close to the actual stomp boxes. So if you are on a budget and want to try out some different amp tones or effects this is a cool pedal. I love the syth, wah, auto way, and pitch bending effects. For the money this unit is well worth it. Some people complained the wah is not that great, but to me it sounds good. I have a Morley bass wah and this thing is close. As far as usability and gigging . . . I couldn't find a way to bypass a patch other than create a clean patch and jump to that from the patch I want to use. That's fine if you only use one patch, because you'll have to scroll to patches you want to use rather than turn it on or off. You can use the pedal in stomp box mode where you can turn off individual effects with the pedal but not the group. My work around was to use a bypass pedal with this unit. Then I can utilize my pure clean signal and jump to and turn on or off an patch for the whole or part of the song. The looper is cool, but it does not retain the recorded loop after you power down the unit. I wanted to use the loopper to play a sample while playing live, but that's not going to work unless you record the sample right before you play. The tuner is great. So for a practice tool with a tuner and a mini drum machine AND the ability to play with some effects, it's awesome! If you're looking for gigging with great sounds then stick to stomp boxes. But if you want to test out effects and play a few live with a bypass pedal then get this thing. After thinking about it, I changed this from 4 stars to 5 because of the price and what you get!

## Features

- SEVENTY-PLUS EFFECTS AND NINE AMP MODELS FOR BASS – Explore a wide range of sounds from clean compression to fuzz, synth, and modulation, plus 9 classic amp models for stage-ready tones.
- LOOPS, DRUMS, AND LAYERS WITHOUT EXTRA GEAR – 68 rhythm patterns and a built-in looper let you develop ideas, practice timing, and build layered bass parts without extra gear.
- EXPRESSION PEDAL FOR REAL-TIME SOUND SHAPING – Shape your sound on the fly by controlling volume, wah, delay, pitch, and more for dynamic performances.
- FIVE EFFECTS SIMULTANEOUSLY IN ANY ORDER – Use up to five effects simultaneously and arrange them in any order to create your own signature sound.
- CHROMATIC TUNER WHEREVER YOU PLAY – Built-in chromatic tuner makes it easy to keep your bass sounding its best wherever you play.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07MZQNKYQ |
| Amperage | 9 Amps |
| Audio Output Effects | Auxiliary |
| Best Sellers Rank | #3,220 in Musical Instruments ( See Top 100 in Musical Instruments ) #11 in Electric Guitar Floor Multieffects |
| Brand | Zoom |
| Brand Name | Zoom |
| Color | Red |
| Connector Type | USB Micro-B |
| Controls Type | Knob, Button, Footswitch |
| Customer Reviews | 4.6 out of 5 stars 1,939 Reviews |
| Global Trade Identification Number | 00884354020705 |
| Hardware Interface | USB |
| Included Components | User manual, Expression pedal (possibly) |
| Item Dimensions | 6.2 x 8.5 x 2 inches |
| Item Dimensions L x W x H | 6.2"L x 8"W x 2"H |
| Item Type Name | Bass Multi-Effects Pedal |
| Item Weight | 1.84 Pounds |
| Manufacturer | Zoom |
| Manufacturer Part Number | B1X FOUR |
| Model Name | B1X FOUR |
| Model Number | B1X FOUR |
| Power Source | Battery Powered |
| Product Dimensions | 6.2"L x 8"W x 2"H |
| Signal Format | Analog |
| Style | B1X FOUR |
| UPC | 884354020705 |
| Unit Count | 1.0 Count |
| Voltage | 9 Volts |
| Warranty Description | 1 year - replacement. |

## Product Details

- **Brand:** Zoom
- **Color:** Red
- **Item Weight:** 1.84 Pounds
- **Product Dimensions:** 6.2"L x 10"W x 2"H
- **Style:** Boom microphone stand with a telescoping boom arm

## Images

![B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered - Image 1](https://m.media-amazon.com/images/I/81cA-alqJnL.jpg)
![B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered - Image 2](https://m.media-amazon.com/images/I/81ZAq7-pgOL.jpg)
![B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered - Image 3](https://m.media-amazon.com/images/I/81uxc67Ci2L.jpg)
![B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered - Image 4](https://m.media-amazon.com/images/I/81fNtldv60L.jpg)
![B1X FOUR Bass Multi-Effects Processor with Expression Pedal, 70+ Built-in Effects, Amp Modeling, Looper, Rhythm Section, Tuner, Battery Powered - Image 5](https://m.media-amazon.com/images/I/81wkGiv4UIL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Questions & Answers

**Q: trying to decide which one to get... what exactly does the expression pedal do?**
A: The expression pedal offers several functions. Yes, it can adjust volume or be used as a wah but it can also adjust intensity of effects. It's nice to be able to adjust the amount of overdrive or phaser, etc.., for example, with your foot.  You can use it to adjust the pitch when using that effect.

**Q: Can i use it with an ukulele because i'm a bass and ukulele player. Also can we connect it to an audio digital interface like focusright Scarlett?**
A: Yes you can connect it to focusrite interface, I don’t know for sure if a ukulele will work with the bass processor since if mainly for the bass guitar.

**Q: Unit won't stay powered on for more than a second when under battery power, second one I ordered with same problem, purchased end of August 22.**
A: Use the android plug, it works great for hours, don't drop anything on it, falls,  or spills she's easy to bust

**Q: How do you get the device that you plug in to play music through Zoom(such as phone) to play in stereo? I can only get mine to play mono.**
A: You must be plugging your phone in with a mono cord, I would try a different aux cable.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Little Machine!
*by M***E on July 23, 2021*

Whoa, if you want some superior bang for your FX pedal bucks, this Zoom B1-4 is the deal of the century! I'm NOT exaggerating. This little jewel is undoubtedly the BEST bass effects pedal I've ever owned or played with. It has everything you'll need, including amp modelling, outstanding compression--the "Glam Comp" setting delivers jaw-dropping sustain, the likes of which I've NEVER heard before--an auto-wah that is a blast to play with, all sorts of nifty filter variations, and even some classic amp tone models right out of the history books. When I first plugged it in and started messing with it, I was astonished by this unit's range and versatility. I could get nearly any tone or amp sound, any kind of filter effect I wanted. It's ridiculously simple to use and has an open, "blank" bank in it that allows you to copy an effect from a different bank into an open slot. It's stupid-easy to set up a series of presets in linear order in the blank bank so that just a touch of your toe cycles quickly to the effect you want. I set mine up with the auto-wah first, then the "hard comp," followed by the "glam comp," with an Ampeg SVT amp model, then a vintage Fender cabinet, leaving four more slots open if I want to add something else, simply by copying the desired patch--a three click operation--into any of the remaining slots. Make a mistake? Easy-peasy: delete it and do it again. Takes less than a minute to reprogram it. Not satisfied with the internal patches? No prob; the unit lets you tweak the parameters to suit your own ears. I didn't get into that; I really liked what I heard. Zoom's engineers really put some serious thought and research into this. There are only two drawbacks: it's made of a relatively lightweight plastic, not aluminum or steel, so it's a wee bit fragile. DON'T drop it! I suggest buying the carrier case that's available. I'm glad I did. It's a hardshell case and protects the unit really well. The other drawback is that some of the patches are a bit...well, WEIRD. One of them is labelled "Explosion." I tried it. Yes, it sounds like someone set off a nuke in the next county. Or a really mean thunderstorm. I dunno, you metal players might find a use for it--but a few oddball patches that I'll never use does not mean a deal-breaker. The price will make your jaw drop, too: around $90. (Zoom might increase the price later. I'm astounded that it's THIS inexpensive.) Shipping will add a bit more and if you get the case, you're looking at a total of around $125 for both. Yes, it comes with a wall-wart that has a nice long cord. All told, the Zoom B1-4 is about HALF the price of a comparable steel or aluminum sheathed unit from any other manufacturer--and it does five times the job. It's clean and quiet enough for recording. Onstage, it sounds frickin' AWESOME. I kick the glam comp on when I hit a low E at the end of a tune and that note will sustain for several minutes. I do NOT exaggerate! No foolin', this is the deal of the century. It's now the ONLY pedal I use onstage for my bass (a Squire Affinity series J-bass with active electronics which is itself an awesome machine.) and I can't see myself using anything else for some time to come. Warning: it will peg the meters on the sound board if you don't give the engineer a heads-up during the sound check. I'm serious. This little beast is POWERFUL.

### ⭐⭐⭐⭐⭐ Better than I thought!
*by F***Y on October 19, 2022*

I play bass for the all pro band Rat Soup so quality sound is a high priority. I typically don't use effects and have always wanted to try them so I purchased this unit. I was not disappointed. A pure signal chain is important to me so I wanted a clean bypass. The bypass signal is very close to the original. So it's not so big of a loss in a live performance, but I would not record with it. As far as tones, there are some great ones and they sound pretty close to the actual stomp boxes. So if you are on a budget and want to try out some different amp tones or effects this is a cool pedal. I love the syth, wah, auto way, and pitch bending effects. For the money this unit is well worth it. Some people complained the wah is not that great, but to me it sounds good. I have a Morley bass wah and this thing is close. As far as usability and gigging . . . I couldn't find a way to bypass a patch other than create a clean patch and jump to that from the patch I want to use. That's fine if you only use one patch, because you'll have to scroll to patches you want to use rather than turn it on or off. You can use the pedal in stomp box mode where you can turn off individual effects with the pedal but not the group. My work around was to use a bypass pedal with this unit. Then I can utilize my pure clean signal and jump to and turn on or off an patch for the whole or part of the song. The looper is cool, but it does not retain the recorded loop after you power down the unit. I wanted to use the loopper to play a sample while playing live, but that's not going to work unless you record the sample right before you play. The tuner is great. So for a practice tool with a tuner and a mini drum machine AND the ability to play with some effects, it's awesome! If you're looking for gigging with great sounds then stick to stomp boxes. But if you want to test out effects and play a few live with a bypass pedal then get this thing. After thinking about it, I changed this from 4 stars to 5 because of the price and what you get!

### ⭐⭐⭐⭐ Updated: Good tones after some tweaking
*by J***E on October 26, 2024*

Update: I've had this for about a month now and this pedal does provide some really good tones but the one I have is susceptible to radio interference when using higher gain settings which is somewhat reminiscent of a scene in the Spinal Tap movie. Cleaner tones are fine but for high gain stuff this may not work for you. I purchased this as a backup to my main multi fx amp modeler and for that purpose it's fine. It is an entry level multi fx/modeler so don't expect Fractal FM9 tones. Overall I'm happy with it and it's good to have in the gig box in case the main unit craps out. Here are some pros, cons, and tips. Pros: Great value. Good selection of effects, amps and cab sims. With a bit of tweaking good tones can be had. Primarily plastic construction but the build quality is good. There is a rhythm function for practice, and a looper as well. The Guitar Lab app make editing presets pretty easy on your PC or Mac. Cons: Most of the presets are set to run into the front of a guitar amp are not going to sound good without changes if you run through a PA or FRFR. Presets have up to 5 effect/amp/cab blocks available and when used as a modeler 2 blocks are going to be used for the amp and cab sim leaving only 3 for effects and such. The user interface on the pedal wasn't intuitive for me so it took some time to figure out. Tips: Download the full manual and the Guitar Lab app from the Zoom website. The included quick start guide just covers the basics. If you use headphones, PA or a full range flat response speaker the "mic" setting on the cab sim blocks must be turned on. Any preset with a cab sim has that setting turned off by default. So to recap, it's a good unit, the price is reasonable and Zoom makes quality stuff.

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-06-04*