Short answer: the Bowers & Wilkins Px7 S3, though neither ranks well in its class. It ranks #453 of 481 over-ear headphones by sound quality, rated 1.7/5, at $429. The iBasso SR1 ranks #465, rated 1.5/5, at $399, $30 cheaper, a saving that is not big enough to make up the sound-quality gap. Both are rated below 3.0/5 among the 481 over-ear headphones; for better sound, the HIFIMAN Ananda Nano ranks #6 at $319.
Why pick the Bowers & Wilkins Px7 S3: It brings active noise cancelling, a claimed 30 hours of battery life and Bluetooth 5.3 with an unusually wide codec list, including aptX Adaptive, aptX HD and aptX Lossless alongside AAC. Watch for: In two hobbyist measurements on squig.link it scores only 30.7 for Harman preference with a 4.23 dB deviation, one of the least accurate responses in its class.
Why pick the iBasso SR1: A low 22 ohm impedance means the 50 mm dynamic driver runs from a phone or laptop without a separate amp. The catch: Crinacle’s measurement gives it a preference score of only 25, with a steep warm tilt and large deviations of about 4.5 dB on average from the Harman target, so most listeners will hear a muffled, uneven balance.
Buy the Bowers & Wilkins Px7 S3. It is rated higher for sound quality, and the $30 saving on the iBasso SR1 is not enough to make up the difference.
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It brings active noise cancelling, a claimed 30 hours of battery life and Bluetooth 5.3 with an unusually wide codec list, including aptX Adaptive, aptX HD and aptX Lossless alongside AAC.
Amazon $429.00 eBay
A low 22 ohm impedance means the 50 mm dynamic driver runs from a phone or laptop without a separate amp.
Amazon $399.00 eBayPrices on this page were last checked October 16, 2026 at 5:46 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Bowers & Wilkins Px7 S3 | iBasso SR1 | |
|---|---|---|
| Price | $429.00 | $399.00 |
| Ranked | #453 of 481 in Over-Ear Headphones | #465 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 31 (median of 2 squig.link measurements, calibrated to AutoEQ) | 25 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 4.23 dB standard deviation | 4.48 dB standard deviation |
| Tonal Tilt | -2.01 (negative is warmer, positive brighter) | -2.12 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+5.6 dB at 30 Hz) | - |
| Connection | Wireless and wired | Wired |
| Back | Closed | Semi-open |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 40mm dynamic | 1 x 50mm dynamic |
| Weight | 0.7 lbs (300 g) | 0.9 lbs (420 g) |
| Frequency Response | 10Hz - 30kHz (Manufacturer specified) | 3Hz - 40kHz (Manufacturer specified) |
| Active Noise Cancelling | Yes | - |
| Battery Life | 30 hours (Manufacturer specified) | - |
| Bluetooth Version | 5.3 | - |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, aptX Adaptive, aptX Lossless | - |
| Built-in Microphone | Yes | No |
| IP Rating | None | - |
| Impedance | - | 22 ohms |
| Sensitivity | - | 108 dB |
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