We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 6 min read · Independent comparison
If you want a wired, battery-optional headphone built around a built-in DAC and amplifier for true hi-res listening from a PC, Walkman, Xperia or Apple device, choose Sony MDR1ADAC/B; if you need wireless freedom with adaptive noise cancellation, a mic array for calls and dramatically longer battery life, choose Bowers & Wilkins Px7.
• Sony MDR1ADAC/B — biggest strength: a genuine integrated DAC/amp that decodes PCM up to 192kHz/24-bit and DSD 2.8/5.6MHz, with an asynchronous USB clock and S-Master HX amplification. It's a wired headphone and a portable converter in one.
• Sony MDR1ADAC/B — biggest trade-off: no noise cancellation, no wireless, and only up to 7.5 hours of amplified playback per charge. It also asks you to think about cables and input selection.
• Bowers & Wilkins Px7 — biggest strength: up to 30 hours of battery life, aptX Lossless/aptX Adaptive wireless, adaptive noise cancellation with eight microphones, and a 5-band EQ via the Bowers & Wilkins Music app.
• Bowers & Wilkins Px7 — biggest trade-off: its wired 3.5mm option is a convenience, not a desktop DAC path, and the 20Hz–20kHz rating says nothing about ultra-high-resolution decoding the way the Sony's chipset does.
• Pick the Sony if your listening is deliberate, at a desk or on a train with a source you plug in.
• Pick the Px7 if your listening is mobile, spontaneous and mostly untethered.
The MDR1ADAC/B is a strange, wonderful idea: a pair of over-ear headphones with a digital-to-analog converter and amplifier living inside the ear cup. Plug it into a PC, Walkman, Xperia phone or an Apple device over USB or Lightning and the headphone takes over the decoding itself, handling PCM up to 192kHz/24-bit and DSD at 2.8MHz and 5.6MHz. It also has an asynchronous USB clock, which is the kind of design choice aimed at keeping timing errors low when digital becomes analog. The S-Master HX amplifier is Sony's own high-resolution audio circuitry, and the 40mm Aluminum Liquid Crystal Polymer diaphragms are rated across a 3Hz–100kHz range.
Who should buy it? Someone who listens critically at a desk, wants hi-res files decoded properly without buying a separate DAC, and values the enfolding over-ear seal and pressure-relieving urethane cushions for long sessions. Passive mode matters too: with no battery at all, it still works as a normal corded headphone.
Who should skip it? Anyone who wants to walk around untethered, take calls, or block out a plane cabin. There is no noise control, no Bluetooth, and the internal battery is rated at up to 7.5 hours in amplified use. If you hate cables, this isn't your headphone.
Bowers & Wilkins Px7: Who It's For
The Px7 S3 is the opposite philosophy: cut the cord, then engineer everything around that freedom. It's a wireless over-ear with Bluetooth 5, aptX Lossless and aptX Adaptive support that adjusts the connection and performance as conditions change. Inside are 40mm drivers and 24-bit DSP, with a 20Hz–20kHz frequency range and 33-ohm impedance. Sound tuning is handled partly in software — the Bowers & Wilkins Music app gives you a 5-band EQ, adjustable noise cancellation modes, and voice-control access.
The headline number is battery: up to 30 hours per charge, with a 15-minute quick charge delivering around 7 hours. That's a full workweek of commutes on a single charge, and it's the kind of figure that changes how you use a headphone — you stop thinking about the charger.
Noise cancellation is adaptive and driven by eight precision-tuned microphones, which also handle call quality. That combination is what makes the Px7 a genuinely multi-purpose tool: music on a train, calls in a shared office, movies and games at home. The fit story is a lightweight headband with plush memory-foam cushions and a fabric finish, and it ships with a protective case plus USB-C to 3.5mm and USB-C to USB-C cables, so wired listening is available when you want it. Weight is listed at 0.3kg, and there's a 2-year warranty.
Who should buy it? Commuters, travellers, remote workers, and anyone who wants one headphone for music, calls and video without juggling cables. Who should skip it? Someone whose priority is decoding DSD files or running a USB DAC straight from a laptop — that's simply not what this headphone is designed to do.
• Best for hi-res decoding from a computer → Sony MDR1ADAC/B. Its built-in DAC covers PCM 192kHz/24-bit and DSD 2.8/5.6MHz with an asynchronous USB clock.
• Best for battery life → Bowers & Wilkins Px7. Up to 30 hours versus up to 7.5 hours.
• Best for commuting and flights → Bowers & Wilkins Px7. Adaptive noise cancellation with eight microphones versus no noise control at all on the Sony.
• Best for calls → Bowers & Wilkins Px7. The mic array and app-based control are built for voice; the Sony has a remote media control and no noise control.
• Best for people who refuse to charge → Sony MDR1ADAC/B. Passive mode runs corded with no battery.
• Best for wireless freedom → Bowers & Wilkins Px7. Bluetooth 5 with aptX Lossless and aptX Adaptive, plus app EQ.
• Best for a fixed desk setup → Sony MDR1ADAC/B. Auto input select for iOS, USB, Walkman and Xperia makes source switching painless.
• Best for one headphone that does everything on the move → Bowers & Wilkins Px7.
• Best for tinkerers who like cables and connectors → Sony MDR1ADAC/B, which ships with USB, Walkman, Xperia, Lightning and standard audio cables.
If I were buying for myself and my listening happened mostly on trains, in offices and on walks, I'd take the Bowers & Wilkins Px7. Up to 30 hours of battery, adaptive noise cancellation and a mic array make it the more useful object day to day, and the app's 5-band EQ lets me shape the sound without changing hardware.
But if I wanted the best possible digital source at a desk — DSD files, a laptop, no separate DAC — I'd take the Sony MDR1ADAC/B without hesitating. In my opinion it's the more specialist, more interesting headphone of the two, and passive mode means it never becomes a paperweight. Check the current price on Amazon before deciding, since the two sit in different value conversations.
Not universally. The Sony decodes higher-resolution formats natively (PCM 192kHz/24-bit, DSD 2.8/5.6MHz) and covers 3Hz–100kHz. The Px7 uses 24-bit DSP and aptX Lossless wirelessly. If your files are hi-res and you listen wired, the Sony has the technical edge; for wireless everyday listening, the Px7 is the better fit.
Yes. It has adaptive active noise cancellation using eight precision-tuned microphones, with modes adjustable in the Bowers & Wilkins Music app. The Sony MDR1ADAC/B has no noise control feature at all.
Yes. Passive mode lets it run as a normal corded headphone with no battery. Amplified playback is rated at up to 7.5 hours per charge.
Up to 30 hours on a single charge, with a 15-minute quick charge giving roughly 7 hours of playback.
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