We have already illustrated that the Sennheiser CX 400BT has tough competition. Straight up on the spec sheet, it misses active noise cancellation. You may feel it’s a big miss, but really, it isn’t. If you’d really want ANC still, the Sony WF-1000XM3 are yours to pick then.

The Sennheiser CX 400BT is a compact truly wireless set with a charging case that is easily held in your hands....

Sennheiser want to demonstrate that — in addition to their excellent Momentum True Wireless , which are right at the top of the charts both in terms of hit lists and price — they are quite capable of catering to the upper mid-range of the market.

With its third set of true wireless earbuds, Sennheiser’s CX 400BT is a more affordable option. The company manages to mostly retain the stellar sound quality from the Momentum True Wireless 2 along with customizable and reliable touch controls.

Great sound; Customizable controls; Configurable EQ

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

Sennheiser’s first true wireless headphones outside the Momentum range offer the same superb sound quality without such a steep price tag

Superb sound quality; Stable connection; Quick; seamless pairing

No splash proofing; No ANC; Not cheap

The Sennheiser CX 400BT True Wireless earbuds have an understated design but pack 7mm full range dynamic drivers for the detailed and wide sound that belies its modest looks. Add in a light build and comfy ear tips for comfortable extended wear when working from home or on the go and you have an...

Sennheiser has a reputation for top-quality sound, and both the Momentum True Wireless and its sequel, the Momentum 2 True Wireless, scored very highly on sound quality when we reviewed them. But along with that excellent sound comes a fairly steep price — $300 is what you’ll pay for these earbuds. Clearly, that eliminates a lot of potential buyers. So the challenge for Sennheiser was to create a set of true wireless earbuds that cost less without sacrificing the biggest reason for buying them in the first place: High-quality sound. Its answer to that challenge is the $200 CX 400BT True Wireless. Their price is definitely more palatable, but do their overall feature set and performance make them a worthwhile investment when you consider how many other excellent earbuds can be had for the same, or similar, money? Let’s take a look. The CX 400BT’s relatively plain cardboard box contains the earbuds, their charging case, a set of four sizes of silicone eartips (large, medium, small, and e...

Superb sound quality; Responsive and customizable controls; Highly adjustable onboard EQ;

Lacks features for the money; Possible fit and comfort problems;

“The sound is incredible, but the cost of a lowered price is a bunch of missing features.”

Superb sound quality; Responsive and customizable controls; Highly adjustable onboard EQ

Lacks features for the money; Possible fit and comfort problems

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 that.

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

As long as you don’t find their treble response puts your teeth on edge too badly, there’s really no reason not to give them thorough consideration.

Wide-open; lavishly detailed and informative sound; Fine touch- and app-control; More comfortable than they look

Don’t really look or feel the money’s-worth; Periodically spiky treble; Humdrum battery life