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19 Aug 2020

Review: Zoom B1X Four 'the effects pedal for bass players'

instruments Review: Zoom B1X Four 'the effects pedal for bass players'

The in Tokyo-based company ZOOM known for its affordable audio equipment has released a number of highly versatile effect processors, namely the A1 Four, G1 Four, and B1 Four for acoustic-electric and bass guitars (A1 Four is for various acoustic instruments). Perfect for live jams, experimenting with different sounds, as an aid to soloing or just to practice your loop skills. Each processor is also available in the expression variant in which an expression pedal is integrated into the effects processor, these are the A1X Four, G1X Four, and the B1X Four. In this article, we take a closer look at the B1X, the multi-effects pedal specially developed for electric bass guitars.

We wrote the following review in collaboration with the distributor Sound Service.



The Zoom B1X is a fairly compact effect processor that has several very interesting functions. These include a large arsenal of different effects, integrated rhythm patterns, a looper function, an expression pedal, an anti-feedback filter, and a built-in tuner. The zoom B1X is equipped with:

  • More than 60 built-in effects
  • 9 amplifier models for simulating classic amplifiers
  • 50 memory locations for storing user-made patches
  • A looper for recording up to 30 seconds
  • ZOOM Guitar Lab software for creating, editing and managing effects and patches
  • 68 built-in rhythm patterns
  • A built-in chromatic tuner
  • A battery life of 18 hours

How does it work?

  • Effects

The Zoom B1X provides access to more than 60 built-in effects and 9 amplifier simulations. In addition, 5 effects can be used simultaneously and each effect can be turned on or off in blunt mode. The B1X works with patches of which 5 effects can be loaded in each patch. By default, a number of different patches are already loaded in the effect processor and it is possible to adjust a patch or to compose a patch yourself.

  • Rhythm section

The rhythm section consists of 68 rhythm patterns including Samba, Reggae, Jazz, Funk, and many more whose BPM and volume can be adjusted per rhythm pattern in the rhythm mode.

  • Looper function

The looper function works quite simply like many other loop stations. A loop of up to 30 seconds can be recorded that allows you to create multi-part arrangements. You simply press the record button and the effect processor counts down so that you can start at exactly the right time. You can then play multiple loops on top of each other and in the meantime it is still possible to switch between different patches/effects.

  • Expression pedal

The expression pedal gives you the ability to have real-time control over effects such as pitch, volume, reverb, delay, and wah-wah.

First impression

The display of the B1X reminds me a bit of the LCD screen of the old Nintendo Gameboy, this relatively simple display shows everything very nicely in a very innovative and functional way. Despite the many functionalities, it is a freely accessible effect processor. Whether you already have experience with effect processors or loop stations or not, with the B1X it really doesn't matter. Especially since several patches have already been loaded, it is quickly possible to experiment with different sounds. If you want more options, you can see in edit mode which effects are linked to the respective patch and you can make adjustments here. 

The rhythm and looper functions are also quite simple, you set your rhythm and press the play button. Then you go to your looper and start recording your first loop. Press the record pedal again and your loop will play, if you are not satisfied, hold the record pedal for a few seconds and your loop will be removed. Therefore, a very accessible operation for a very extensive effect processor.



The B1X is perfect for musicians who want to experiment with different sounds without spending a lot of money on effect pedals and amplifiers. The built-in rhythm section is especially interesting for bassists. You can now play endless bass loops without the band going crazy and you can also play over yourself with the looper section. This will bring many possibilities for you as a bass player.

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