Phil Jones Bass X4 NanoBass Combo review

How does a bass amp featuring nanotechnology size up? Not too badly as it goes, with Phil Jones making the most of an improbably small format

Phil Jones Bass X4 NanoBass
(Image: © Phil Jones Bass)

Guitar World Verdict

An amp the size of a shoebox shouldn’t sound this good – but it does.


  • +

    Fantastic tone.

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    A tiny package.


  • -

    Awkward plug angle.

  • -

    Lacks a direct output.

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    Innovation comes at a price.

You can trust Guitar World Our expert reviewers spend hours testing and comparing guitar products so you can choose the best for you. Find out more about how we test.

Amp designer and mad scientist Phil Jones has built a reputation for getting a big sound out of small speakers, but there’s usually more than one of them in his products. His latest creation is the multi-instrumental X4 Nanobass, which his company calls the most compact and portable combo he’s ever designed. 

The unit features a single four-inch driver in an enclosure that measures 6.3” by 7.9” by 7.8” and weighs just 5.3 pounds. Billed as the perfect bass amp for your desktop or on the go, it has a headphone jack for silent practice and, crucially, two options for playback from external sources.

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