Bowers & Wilkins Px7 S3 headphones beat Sony XM6 in one key way

British audio icon, Bowers & Wilkins (B&W), has always had its rabid fans, especially in the world of loudspeakers, where its combo of sound quality and design has earned it a lot of admiration. However, I’ve never felt that the company’s wireless noise-canceling headphones quite live up to this sterling reputation — until now.

Bowers & Wilkins headphones have traditionally been more expensive than their rivals, even as the sound and features lagged behind. I was expecting the same from the brand's latest effort, the Px7 S3 over-ear headphones.

But moments after popping them on my head, I was ready to change my tune. And not only do they sound great, but they're a serious upgrade over the all-plastic design of the Sony XM6 headphones.

So, let's dive into my full Bowers & Wilkins Px7 S3 headphones review.

The new B&W Px7 S3 Headphones: Just the specs

Let's start with the basics:

• Microphones: 8

• Connectivity: Bluetooth 5.3 (aptX Adaptive/Lossless support)

• Battery: 30 hours with ANC

• Charge time: ~3.5 hours

• Noise cancellation: Active noise cancellation

• Spatial audio: Planned (future software update required)

• Colors: Anthracite Black, Canvas White, and Indigo Blue

• Inputs: USB-C

• Quick charge: 7 hours in 15 minutes

• Materials: Fabric, aluminum, and synthetic leather

Bowers & Wilkins Px7 S3 review: What’s new?

The Px7 S3 has a variety of updates from the S2 and S2e, including a sleeker, lower-profile shape, a redesigned headband, repositioned controls, support for aptX Adaptive and aptX Lossless codecs, more microphones, improved ANC and transparency, and revised driver design.

B&W has also made a few changes in its Bowers & Wilkins Music companion app, like the availability of a five-band equalizer.

The company plans to issue a future software update to enable spatial audio. This has become a standard feature in other flagship headphones, so it's disappointing not to find it here, especially since they have the same price as the new Sony XM6 noise-cancelling headphones.

What’s not new?

Battery life remains unchanged at 30 hours (plus a 7-hour quick charge after 15 minutes), it still comes with a zippered (though slightly slimmer) hard case and a USB-C and 3.5mm analog cable. Lossless, hi-res audio at up to 24-bit/96kHz is supported via the USB-C cable.

Bowers & Wilkins Px7 S3 review: I love the design

Looks are (obviously) subjective, but I think the Px7 S3 are in a class by themselves.

The combination of materials (fabric, aluminum, and synthetic leather) and B&W’s sleek, understated styling makes these cans a joy to behold and a pleasure to wear. Compared to the all-plastic construction of Sony’s 1000X series or the giant aluminum shells of Apple’s AirPods Max or Dyson OnTrac, the Px7 S3 are the rare headphones that look as good on your head as sitting on your desk.

Don’t like the Anthracite Black color pictured here? They’re also available in Indigo Blue and Canvas White.

For the Px7 S3, B&W has increased the width of the headband from the Px7 S2, and the earcushions are more generously padded. This takes an already comfortable design and makes it even better for long-term use.

The single-sided yokes are now more rounded, yet they still let you position the earcups up or down when worn around the neck.

My only nitpick: the included USB-C cable is just too thick and inflexible to be used comfortably when listening to USB Audio (more on that feature in a moment).

Bowers & Wilkins Px7 S3 review: Controls

Keen-eyed observers will note that the control buttons now sit on the beveled outer edge of the earcups, instead of on the flat rear edge. At first, I was concerned that this would make them harder to use, but in some ways, they’re now easier to reach — I don’t mind it at all.

Strangely, B&W has made the volume buttons larger and the multifunction button smaller than on the Px7 S2. Maybe it’s just me — I tend to play/pause and skip tracks more than I change volume — but I’d prefer they have the opposite proportions.

The ANC button, located on the left earcup, provides nearly instant mode changes, but for the life of me, I still don’t know why B&W insists on forcing us to cycle through all three (ANC > Transparency > Off), instead of letting us skip the Off mode entirely.

Another head-scratcher: You can control ANC with this button, or summon your voice assistant, but you can’t have both.

One of my favorite features of the S2 is the wear sensors, and thankfully, they’re just as good on the S3. Removing either earcup — even just a little ways — instantly pauses your tunes, while replacing them resumes playback just as quickly.

Bowers & Wilkins Px7 S3: Noise canceling and transparency

The Px7 S3 have a larger array of mics than their predecessors — eight vs. six — which should, in theory, help to improve active noise cancellation (ANC) and transparency mode. ANC is indeed better, though only moderately so. 

It can reduce the most annoying background sounds, but you’ll still get better ANC results from the Bose QuietComfort Ultra Headphones and the Sony WH-1000XM6, particularly when flying or while trying to shut out droning machinery sounds. Transparency mode on the Px7 S3, however, is a significant step up from the S2 model. You notice it immediately, thanks to the clarity of your voice.

It’s still not as mesmerizingly perfect as Apple’s AirPods Max, but honestly, it’s more than good enough for phone calls and casual conversations.

Bowers & Wilkins Px7 S3 review: Impressive sound quality

On B&W’s spec sheet for the Px7 S3, it lists “40mm bio-cellulose drivers” — the same description used for the Px7 S2. But this is an oversimplification. In reality, the S3’s drivers use a redesigned and improved chassis, voice coil, suspension, and magnet, and they make a huge difference to the sound.

Clarity, definition, soundstage, and precision are all enhanced. These are the first Bowers & Wilkins Px7 series headphones that finally sound as good as they look.

I could spend a lot of time encouraging you to take advantage of the S3’s aptX Adaptive and aptX Lossless codecs on a compatible phone. And, you should absolutely use their hi-res, USB audio connection when a wire won’t get in your way (a feature you won’t find on Bose or Sony’s flagships).

But frankly, you can hear and appreciate the S3’s improved audio quality even over a standard SBC or AAC Bluetooth connection (good news for iPhone owners). Setting aside all of the S3’s other improvements, I would happily pay the extra $50 over the price of the S2 just for the sound.

B&W’s excellent factory tuning, with its careful balance of frequencies, is now known as True Sound; this is the EQ setting you get by default in the Bowers & Wilkins Music app. What’s new is the ability to fine-tune this balance using a five-band equalizer, instead of the simplified bass and treble sliders the app shows to S2 owners.

After trying a few adjustments, however, I returned to the True Sound setting and never looked back. To my ear, it’s just about perfect.

Bass has plenty of authority without ever getting boomy or overbearing, and the mids are clear and distinct. Curiously, in the upper-mids and highs, the S3 are something of a return to form. I noted in my Px7 S2 review that the PX7’s high-energy sound signature had been taken down a notch or two. For the S3, B&W seems to have split the difference, and it’s a balance that I think a lot of folks will like. It’s very close to Sony’s tuning on the WH-1000XM6.

Call quality

Those extra mics help the S3 achieve better call quality than its predecessor. The biggest difference is the number of times your callers will hear background sounds -- they’re almost entirely eradicated. When they’re particularly loud, the algorithm still struggles to keep your voice from being distorted, but most of the time, they’ll have no idea you’re not at your desk.

Transparency mode is perfect for reducing the fatigue associated with having your voice muffled by the earcups.

Bowers & Wilkins Px7 S3 review: Battery life

It’s B&W’s belief that most folks will always keep ANC on while using the Px7 S3. As such, it only quotes one number for battery life: 30 hours. That should be more than enough to get you through even the longest flight, but keep in mind that if you listen louder than 50% volume, or if you’re in an especially noisy environment, that number will be lower -- perhaps as much as 15-20% lower.

It’s also worth noting that when the company releases its spatial audio upgrade, it’s a good bet that this will also impact battery life. On Bose’s QuietComfort Ultra Headphones, for instance, the Immersive Audio feature can reduce playtime by up to 25%.

If you’re worried about stamina, you can always disable ANC, and if that’s still not enough, the Px7 S3 have a very impressive quick-charge time of an extra 7 hours for just 15 minutes of charging.

One more (missing) feature

It’s clear that B&W has tried to future-proof the Px7 S3 by including both hi-res audio (via aptX Adaptive and USB Audio) and the potential for spatial audio down the road. Which is why I’m a bit baffled by the lack of support for Bluetooth LE Audio and Auracast. 

Auracast, which lets compatible wireless headphones tune in to publicly available Bluetooth broadcasts, has just started making its way into our lives. But it will soon be ubiquitous in places like airports, museums, movie theaters, gyms, sports arenas, and even at home via our TVs.

Sennheiser, Sony, JBL, and others have already jumped on the Auracast bandwagon with their latest flagship headphones, making this a missed opportunity for B&W to keep the Px7 S3 as a leading option in the coming years. 

Are the Bowers & Wilkins Px7 S3 worth it?

B&W headphones are usually more expensive than the competition, but that's no longer the case. As Mashable's tech editor noted in his Sony XM6 review, $449 is the new standard price of admission for premium headphones.

So, are they worth $449? I say yes, especially if you care about design. The Sony XM6 headphones may have advantages like superior ANC and spatial audio, but they also have an all-plastic construction, whereas the slick-looking Px7 S3 are made from fabric, aluminum, and synthetic leather. With killer sound and a cool aesthetic, they're a solid contender in a very competitive market.