Zoom B1X Four Bass Guitar effects Pedal

The B1X Four is a feature-rich multi-effects pedal for bassists that packs in a lot of tools for relatively low cost. Some of its headline features are:

• 70+ built-in effects (distortion, modulation, delays/reverbs, filters, synth/pitch effects, etc.). 

• 9 amp & cab models/simulations. 

• Looper (30 seconds) and built-in rhythm/drum machine (68 patterns). 

• Expression pedal (the “X” version) to control parameters like volume, wah, pitch effects, etc. 

• Aux input, tuner, headphone output, USB connectivity, battery power option. 

Pros:

1. Value for Money
   You get a lot of features in one unit — effects, amp modeling, looper, rhythm machine. For many users, this replaces a whole board of pedals. 

2. Versatility & Tone Options
   The effects are generally usable, especially for practice, songwriting, home studio work or small gigs. The amp simulations are decent, especially for basic tones. It’s not boutique, but it gives you a lot of choice.

3. Portability & Power
   Being battery powered (AA) or USB powered gives you flexibility (e.g. busking, travelling). Also fairly lightweight. 

4. Expression Pedal Adds Good Real-Time Control
   Having the expression pedal in the B1X Four makes effects like wah, filter sweeps or volume swells more usable. It improves the live or expressive playing experience.

5. Practice and Creative Features
   The looper and drum machine are very useful tools for practice, soloing, or idea-sketching. Also having 50 patch memory slots is helpful. 

Who It’s Best For

This is a pedal that hits a particular sweet spot. If you are one of the following, this could be an excellent choice:

• Beginner to intermediate bassist who wants to explore effects without investing in a big pedalboard.

• Home studio players who need a DI/amp simulation, headphone-friendly practice tools, and flexibility.

• Travelling / gigging lightly: this works for small gigs, busking, rehearsal, etc., especially if you don’t need an ultra rugged unit.

• Someone who values versatility and experiments with effects chains, loops, rhythms, etc.

For what it offers and at its price point, the Zoom B1X Four delivers a lot of bang-for-buck. It doesn’t pretend to be high-end boutique gear, but it’s not trying to be. Its strengths are its versatility, its feature set, and its suitability for learning, practicing, and small gigs.