Short answer: the JBL Tune 720BT. It ranks #65 of 481 over-ear headphones by sound quality, rated 4.1/5, at $89.95; the Sony MDR-ZX310 ranks #97, rated 4.0/5, and costs $90.42, so there is little reason to consider the other one.
The case for the JBL Tune 720BT: In hobbyist measurements it scores 84.9 for closeness to the preferred target with a smooth 2.07 dB deviation, an unusually accurate tuning for an affordable wireless headphone. The tradeoff: There is no active noise cancelling, so it blocks only as much noise as a closed back can.
Why pick the Sony MDR-ZX310: A preference score of 82 is strong for a budget headphone, and the response stays within 2.4 dB of the Harman target in oratory1990’s measurement. The catch: Sub-bass below 60 Hz is about 17.5 dB under target, so deep bass is effectively missing, and bass from 60 to 200 Hz is also 2.2 dB low.
Buy the JBL Tune 720BT. It is rated higher for sound quality than the Sony MDR-ZX310 and costs less, which makes it the one to get unless you need something the other one does better.
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In hobbyist measurements it scores 84.9 for closeness to the preferred target with a smooth 2.07 dB deviation, an unusually accurate tuning for an affordable wireless headphone.
Amazon $89.95 eBay
A preference score of 82 is strong for a budget headphone, and the response stays within 2.4 dB of the Harman target in oratory1990’s measurement.
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Specifications Side By Side
| JBL Tune 720BT | Sony MDR-ZX310 | |
|---|---|---|
| Price | $89.95 | $90.42 |
| Ranked | #65 of 481 in Over-Ear Headphones | #97 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 85 (median of 2 squig.link measurements, calibrated to AutoEQ) | 82 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.07 dB standard deviation | 2.35 dB standard deviation |
| Tonal Tilt | -0.12 (negative is warmer, positive brighter) | +0.20 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 40 Hz (-9.4 dB at 30 Hz) | Falls 6 dB below target at 63 Hz (-21.0 dB at 30 Hz) |
| Connection | Wireless and wired | Wired |
| Back | Closed | Closed |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 40mm dynamic | 1 x 30mm dynamic |
| Impedance | 32 ohms | 24 ohms |
| Sensitivity | 101 dB SPL @ 1kHz/1mW | 98 dB/mW |
| Weight | 0.5 lbs (220 g) | 0.3 lbs (125 g) |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 10Hz - 24kHz (Manufacturer specified) |
| Active Noise Cancelling | No | - |
| Battery Life | 76 hours (Manufacturer specified) | - |
| Bluetooth Version | 5.3 | - |
| Bluetooth Codecs | SBC, AAC | - |
| Built-in Microphone | Yes | - |
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