Main trade-off
Sennheiser HDB 630
The transmitter occupies a USB data port and stores only one headphone pairing. HDB 630 does not receive aptX Lossless.
Head-to-head
Sennheiser HDB 630 vs Bowers & Wilkins Px7 S3: HDB includes a transmitter, both drop Bluetooth on USB
The short answer
Choose HDB 630 if a compatible USB source needs the included BTD 700 transmitter, or you want parametric EQ and crossfeed. Choose Px7 S3 if your source already supports the wireless route you want and five-band EQ is enough. Both disconnect Bluetooth for USB listening and both require power for analog playback, so neither solves USB music plus phone Bluetooth or a dead-battery cable backup.
Before you choose
The reasoning and the trade-offs
An expensive codec can be an unused feature on your current phone
If you intend to keep your phone for several years, check its supported audio connection before choosing Px7 S3 for aptX Lossless. HDB 630 offers another route by including BTD 700 for compatible USB sources, but it uses aptX Adaptive rather than Lossless reception. The practical choice is whether your existing source already does the job or needs an accessory. Neither label guarantees an audible improvement.
What this is based on
Px7 S3 requires a matching source for aptX Lossless. HDB 630 includes a transmitter for compatible USB data sources, but the headphones receive aptX Adaptive. Hubs and charging passthrough need separate verification.
Main trade-off
Bowers & Wilkins Px7 S3
aptX Lossless requires a compatible source. The headphone feature list does not add that capability to an ordinary phone.
Sennheiser HDB 630
- Choose it for
- Use the included BTD 700 with a compatible USB source instead of sourcing a separate transmitter.
- Use parametric EQ and crossfeed for deliberate music adjustments, without a promised sound-quality advantage.
- Main trade-off
- The transmitter occupies a USB data port and stores only one headphone pairing. HDB 630 does not receive aptX Lossless.
Bowers & Wilkins Px7 S3
- Choose it for
- Use an already compatible aptX source without paying for a transmitter you do not need.
- Choose five-band EQ if that covers your adjustments, with USB and analog listening also available.
- Main trade-off
- aptX Lossless requires a compatible source. The headphone feature list does not add that capability to an ordinary phone.
About this comparison
Compare the included transmitter, USB limits and music controls. Find which premium pair fits your phone and laptop before paying for a codec you cannot use.
Both combine premium wireless ANC with USB and analog listening. The buyer needs to choose a complete source-and-headphone setup, rather than the longest list of audio formats.
Winner by situation
Start with what you need it to do
Your compatible USB source needs an included wireless transmitter
HDB 630 includes BTD 700. Px7 S3 needs a source or separately chosen transmitter that supports the desired codec.
- Sennheiser HDB 630
- Better fit
- Bowers & Wilkins Px7 S3
- Depends
Your source already supports the Px7 S3 codec you want
Px7 S3 can use that existing route. An extra HDB 630 transmitter may add little for this buyer.
- Sennheiser HDB 630
- Good
- Bowers & Wilkins Px7 S3
- Better fit
USB music and phone Bluetooth must work together
Both documented USB procedures disconnect Bluetooth.
- Sennheiser HDB 630
- Not suitable
- Bowers & Wilkins Px7 S3
- Not suitable
You want to try crossfeed on strongly separated stereo recordings
HDB 630 explicitly supplies crossfeed. Px7 S3 five-band EQ is a different adjustment, not an equivalent feature.
- Sennheiser HDB 630
- Better fit
- Bowers & Wilkins Px7 S3
- Depends
The analog lead must work after a completely missed charge
Both need headphone power for analog playback.
- Sennheiser HDB 630
- Not suitable
- Bowers & Wilkins Px7 S3
- Not suitable
What matters in practice
The differences that matter
An expensive codec can be an unused feature on your current phone
If you intend to keep your phone for several years, check its supported audio connection before choosing Px7 S3 for aptX Lossless. HDB 630 offers another route by including BTD 700 for compatible USB sources, but it uses aptX Adaptive rather than Lossless reception. The practical choice is whether your existing source already does the job or needs an accessory. Neither label guarantees an audible improvement.
How we reached this conclusion
Px7 S3 requires a matching source for aptX Lossless. HDB 630 includes a transmitter for compatible USB data sources, but the headphones receive aptX Adaptive. Hubs and charging passthrough need separate verification.
Both fail the same wired-music and phone-availability plan
A parent or on-call worker may want USB laptop music while keeping phone Bluetooth connected. Both manuals require Bluetooth disconnection for USB listening. Paying more between these two does not solve that combined requirement. Use a tested Bluetooth multipoint setup, watch the phone separately or choose another product with the exact mixed-connection behavior documented.
How we reached this conclusion
Both manuals require Bluetooth disconnection during USB listening. Neither headset can guarantee that you will hear a child or emergency notification.
A saved sound preference needs the right kind of control
If older recordings with hard left-right separation bother you, HDB 630 gives you selectable crossfeed to try, alongside parametric EQ. Px7 S3 offers a simpler five-band adjustment. That makes HDB 630 worth considering for someone who actually wants those controls, while Px7 S3 can be sufficient when ordinary tonal changes cover the job. Crossfeed is a listening preference, not a hearing treatment or proof of more accurate sound.
How we reached this conclusion
Sennheiser lists crossfeed and parametric EQ. Bowers & Wilkins lists five-band EQ. These offer different adjustments, with no measured preference or hearing benefit implied.
Check your own setup
Which headphones work with the way you listen?
Start with the way you listen. USB charging is not the same as USB audio, and some headphones need power even with a cable. These choices are examples until you apply yours.
Sennheiser HDB 630
Meets these checksBluetooth listening.
Bowers & Wilkins Px7 S3
Meets these checksBluetooth listening.
Battery figures are manufacturer claims for the stated mode, not measured travel time. Volume, codec, calls and battery age change runtime. Closed earcups can still leak sound. Weight alone does not predict comfort. USB audio needs a compatible source and cable. This check does not assess sound quality, microphone quality or amplifier power.
Choice A
Sennheiser, 700445
HDB 630
Use the included BTD 700 with a compatible USB source instead of sourcing a separate transmitter.
- Best matched use
- Use the included BTD 700 with a compatible USB source instead of sourcing a separate transmitter.
Checked facts
- Wireless source equipment: The standard US HDB 630 package includes a BTD 700 USB-C transmitter. It stores one headphone profile and needs a compatible USB data source.
- USB and phone Bluetooth: USB audio supports computer input and output up to 24-bit/96 kHz. The setup procedure requires disconnecting Bluetooth.
- Analog with an empty battery: Analog playback requires the headphones to be powered on, including when Bluetooth is not used.
- Music adjustments: Parametric EQ and selectable crossfeed.
Choice B
Bowers & Wilkins, Px7 S3
Px7 S3
Use an already compatible aptX source without paying for a transmitter you do not need.
- Best matched use
- Use an already compatible aptX source without paying for a transmitter you do not need.
Checked facts
- Wireless source equipment: Supports aptX Lossless, Adaptive, HD and Classic with compatible sources, plus AAC and SBC. The package includes USB and analog cables.
- USB and phone Bluetooth: USB audio reaches 24-bit/96 kHz and disconnects Bluetooth. Analog playback also needs power and disconnects Bluetooth.
- Analog with an empty battery: Analog listening requires the headphones to be powered on.
- Music adjustments: Five-band EQ in the Bowers & Wilkins Music app.
Meaningful differences
What changes the fit
| What changes | Sennheiser HDB 630 | Bowers & Wilkins Px7 S3 | Why it matters |
|---|---|---|---|
| Wireless source equipment | The standard US HDB 630 package includes a BTD 700 USB-C transmitter. It stores one headphone profile and needs a compatible USB data source. | Supports aptX Lossless, Adaptive, HD and Classic with compatible sources, plus AAC and SBC. The package includes USB and analog cables. | An included transmitter helps only if the source needs and supports it. Native codec compatibility can make extra hardware unnecessary. |
| USB and phone Bluetooth | USB audio supports computer input and output up to 24-bit/96 kHz. The setup procedure requires disconnecting Bluetooth. | USB audio reaches 24-bit/96 kHz and disconnects Bluetooth. Analog playback also needs power and disconnects Bluetooth. | Neither gives the proposed USB music plus Bluetooth phone combination. |
| Analog with an empty battery | Analog playback requires the headphones to be powered on, including when Bluetooth is not used. | Analog listening requires the headphones to be powered on. | Choose another documented passive model if an empty-battery fallback is essential. |
| Music adjustments | Parametric EQ and selectable crossfeed. | Five-band EQ in the Bowers & Wilkins Music app. | The kind of adjustment you will use is more useful than a generic premium-audio label. |
| Advertised endurance | Up to 60 hours at standard resolution or 45 hours at aptX Adaptive 24-bit/96 kHz with BTD 700 under the stated conditions. | Up to 30 hours with ANC on at average volume. | HDB 630 has the longer published claims, but they are not a matched real-world battery test. |
What you give up
Every choice has a cost
If you choose Sennheiser HDB 630
- USB listening disconnects Bluetooth, and analog listening still needs power.
If you choose Bowers & Wilkins Px7 S3
- USB and analog disconnect Bluetooth. Neither cable is a passive fallback when the battery is empty.
Recommendation switch
The decision flips if...
The source needs an included transmitter or you specifically want crossfeed
Choose Sennheiser HDB 630. Those are concrete reasons to choose the HDB 630 package after checking USB compatibility.
Your source already supplies the desired Px7 S3 wireless format and five-band EQ is enough
Choose Bowers & Wilkins Px7 S3. Px7 S3 fits that existing setup without relying on HDB 630 extras.
You require simultaneous USB listening and phone Bluetooth
Choose neither. Both USB routes disconnect Bluetooth. Choose a different verified connection plan.
What matters in practice
Before you choose
You want better control over music without replacing a working phone or losing contact with it at the laptop.
What this comparison cannot tell you
- No matched sound, ANC, microphone or battery testing was performed.
- The supported USB microphone route is explicit for HDB 630. An equivalent Px7 S3 USB microphone route was not established and is not assumed absent.
- HDB 630 weight is excluded because manufacturer documents disagree.
What the facts say
What the comparison shows
Useful conclusions from the current headphones comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Sennheiser HDB 630 |
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| Bowers & Wilkins Px7 S3 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Sennheiser HDB 630
Use the included BTD 700 with a compatible USB source instead of sourcing a separate transmitter.
Use parametric EQ and crossfeed for deliberate music adjustments, without a promised sound-quality advantage.
See price & reviews on AmazonBowers & Wilkins Px7 S3
Use an already compatible aptX source without paying for a transmitter you do not need.
Choose five-band EQ if that covers your adjustments, with USB and analog listening also available.
See price & reviews on AmazonLinks open in a new tab.