The premium Bluetooth headphone space continues to evolve, with brands pushing the limits of wireless sound quality, battery life, and noise cancellation. Two of the most talked-about models in 2025 are the Bowers & Wilkins PX7 S3 and the Sennheiser Momentum 4, both offering a polished listening experience but with very different philosophies. While Bowers & Wilkins leans into its audiophile roots with a focus on refined sound and upscale design, Sennheiser aims to deliver a more versatile, feature-rich package built for daily use. If you’re deciding between these two flagship models, here’s how they stack up across comfort, sound, ANC performance, and more.
What You Get
| PX7 S3 | Momentum 4 |
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Look & Feel
The Bowers & Wilkins PX7 S3 makes an immediate impression with its sleek, contoured design and luxurious materials. The elliptical earcups, metal accents, and matte finish give the PX7 S3 a high-end look that feels more like a luxury accessory than a tech product. The padding is plush, and while the headband has a firmer grip than some, it creates a snug, secure fit without excessive clamping.
By contrast, the Sennheiser Momentum 4 opts for a minimalistic and utilitarian aesthetic. It may not turn heads like the PX7 S3, but its lightweight design makes it exceptionally comfortable. The earcups are generously padded and spacious, and the flexible headband exerts almost no pressure, making it ideal for extended listening sessions. The plastic build might not feel as premium, but it’s undeniably functional and travel-friendly.
Design & Functionality
Both the Sennheiser Momentum 4 and B&W PX7 S3 use similarly sized dynamic drivers. If you have issues with your Bluetooth headphones never being loud enough, then you might find the PX7 S3 to have better potential loudness. With the Momentum 4, it’s easy to reach maximum volume and still not be satisfied with its loudness in some cases. Noise canceling should help with this, though, and both headphones offer it. Between the two, the Momentum 4 blocks out more noise across the frequency spectrum compared to the PX7 S3. The PX7 S3 still provides solid ANC performance, particularly for low-frequency sounds, but it lets in a bit more ambient noise than the Momentum 4.
Bluetooth
The B&W PX7 S3 technically has a better version of Bluetooth supporting 5.3 as opposed to the Momentum 4’s 5.2, but both offer stable connectivity and fast pairing. Android users will find a major advantage with the PX7 S3 with its aptX Lossless capability. The Momentum 4 only has aptX Adaptive in comparison.
Battery Life
Where the Sennheiser Momentum 4 sees its most practical advantage over the PX7 S3 is with its battery life. The Momentum 4 has a massive 60-hour battery, which is double what the PX7 S3 offers. The Momentum 4 has always been one of the best in its price range for battery life, so it’s hard to beat.
Soundstage
The PX7 S3 delivers a spacious and immersive soundstage that feels unusually wide for a closed-back wireless headphone. Instruments are placed in the stereo field, with excellent separation that gives music a more three-dimensional character. While competent in this area, the Momentum 4 offers a narrower and center-focused presentation. It still provides decent layering and imaging, but doesn’t open up the mix in the same way the PX7 S3 does, especially when listening to more complex or orchestral recordings.
Low End
Bass response is one of the most noticeable differences between these two headphones. The Momentum 4 opts for a bold, full-bodied low end that adds energy and warmth to genres like pop, hip-hop, and electronic. It’s rich and rounded without sounding overly boomy, and its fun character will appeal to casual listeners. The PX7 S3, by contrast, takes a more disciplined approach. Its bass is tighter and more articulate, with greater control and speed. While it doesn’t deliver the same physical impact as the Momentum 4, it offers more accuracy and definition, especially in acoustic and jazz recordings.
Mids
In the midrange, the PX7 S3 pulls ahead with a clean, balanced delivery that brings vocals and instruments to the forefront with natural clarity. There’s a smoothness and transparency here that makes everything from piano to lead vocals feel lifelike and well-positioned. The Momentum 4’s midrange is slightly recessed in comparison, which can make certain elements, particularly vocals, feel a bit subdued or less defined in dense mixes. However, its tuning is still pleasant and non-fatiguing, making it easy to listen to for hours on end.
Highs
Treble on the PX7 S3 is crisp and finely detailed, offering a sense of air and sparkle without veering into harshness. Subtle textures in strings and cymbals come through cleanly, giving the overall sound a refined edge. The Momentum 4 plays it safer in this region, rolling off slightly to ensure a smoother, more laid-back listening experience. While this avoids sibilance and works well for long sessions, it can leave some recordings lacking the brightness and nuance that the PX7 S3 captures so effortlessly.
Summary
Both the Bowers & Wilkins PX7 S3 and the Sennheiser Momentum 4 are excellent wireless headphones, but they cater to slightly different audiences. The PX7 S3 is the choice for those who prioritize refined sound quality and elegant design, while the Momentum 4 is a better all-around performer, with superior ANC, unmatched battery life, and a feature-rich app. If you want the most luxurious listening experience and top-tier fidelity, go with the PX7 S3. But if you’re after practicality, comfort, and extended performance, the Momentum 4 is the better daily driver.
The Sennheiser Momentum 4 and Bowers & Wilkins PX7 S3 are available at Audio46.
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