Sennheiser CX 400BT True Wireless

Great sound ; Customizable controls ; Configurable EQ

No ANC ; No ambient sound ; No automatic pausing ; No wireless charging

Lively, detailed sound ; Lightweight fit ; Excellent value for money

Battery life below the best ; Not waterproof

While slightly compromised in the features department, the CX 400BT are sonic marvels – and, at this price, hugely appealing

Excellent audio performance with rich bass depth and detailed highs ; Comprehensive, intuitive, and customizable on-ear controls ; App features adjustable EQ ; Secure fit

Pricey ; Not ideal for gym use

The Sennheiser CX 400BT earphones deliver some of the best on-ear controls and audio performance you'll find in a true wireless pair.

Widescreen, detailed, and quite upfront sound More comfortable to wear than they look Great app and good touch-control

Can be excitable with treble sounds Ordinary battery life Don’t quite look or feel the asking price

They’re not the most glamorous nor the most distinctive – but Sennheiser’s new CX400BT true wireless earbuds have it where it counts. They sound open and articulate, and if there’s detail in a recording to be extracted, you can rely on them to do just...

Decent recording quality. Graphic EQ available. Stable in-ear fit. Great build quality.

Disappointing battery performance. Bulky design.

The are alright for neutral sound. They have a warm sound profile that lacks a bit of low-bass. There's also a dip in the low-bass, which veils vocals and lead instruments. Due to their in-ear fit, their soundstage is very closed-off. On the upside,...

– Comfortable fit, simple design and impressive sound

– Not the loudest and battery life could be better

The Sennheiser CX400 BT wireless earbuds are an ideal pick for audiophiles who don’t want to go beyond the £200 mark. The quality sound and basic design provide a delightful, no fuss audio experience. However, there’s more features and better battery...

Superb sound quality ; Stable connection ; Quick, seamless pairing

No splash proofing ; No ANC ; Not cheap

Great sound ; Good app and features ; Respectable battery life ; Comfortable fit

No ANC ; No water or sweat resistance

And, while not every one of the many bonus features entirely works, it’s great to see so many tools and customization possibilities stuffed into a tiny pair of wireless headphones. Wait for the AirPods 3 if you really want, but if you can live without...

Great sound ; Customisable sound ; Great companion app ; Support for AAC, aptX, and SBC codecs ; More affordable price point

Bland design ; Not water resistant ; No wireless charging ; Not exactly what you'd call cheap