Short answer: the KZ EDX Pro 2. It ranks #669 of 1291 in-ear headphones by sound quality, rated 3.7/5, at $12; the Sony MDR-EX15LP ranks #777, rated 3.5/5, at $9.99. With prices this close, go by the sound-quality ranking rather than the cost.
What the KZ EDX Pro 2 does well: A very cheap single dynamic IEM, the second generation EDX Pro. The tradeoff: Treble sits about 2.9 dB below target, a dark, relaxed balance.
What the Sony MDR-EX15LP does well: In oratory1990’s measurement it earns a preference score of 68, a strong result for such an inexpensive in-ear, with the midrange from 1 to 10 kHz within half a decibel of the Harman target. Watch for: A 7.2 dB dip near 11.9 kHz and air about 3 dB below target take some sparkle off cymbals.
Buy the KZ EDX Pro 2. It is rated higher for sound quality, and saving $2.01 with the Sony MDR-EX15LP does not make up for the sound-quality gap.
Still deciding? The full Headphones rankings cover every ranked option.
A very cheap single dynamic IEM, the second generation EDX Pro.
The Audio Store eBay
In oratory1990’s measurement it earns a preference score of 68, a strong result for such an inexpensive in-ear, with the midrange from 1 to 10 kHz within half a decibel of the Harman target.
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Specifications Side By Side
| KZ EDX Pro 2 | Sony MDR-EX15LP | |
|---|---|---|
| Price | $12 | $9.99 |
| Ranked | #669 of 1291 in In-Ear Headphones | #777 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 9mm dynamic |
| Impedance | 24 ohms | 16 ohms |
| Sensitivity | 107 dB/mW @ 1 kHz | 100 dB/mW |
| Harman Preference Score | 70 (median of 3 squig.link measurements, calibrated to AutoEQ) | 68 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.02 dB standard deviation | 2.24 dB standard deviation |
| Tonal Tilt | -0.84 (negative is warmer, positive brighter) | -0.88 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.5 dB at 30 Hz) |
| Weight | - | 0 lbs (3 g) per earbud |
| Frequency Response | - | 8Hz - 22kHz (Manufacturer specified) |
| Built-in Microphone | - | No |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the KZ EDX Pro 2 from ankramutt, kuping-sensi and theaudiostore; the Sony MDR-EX15LP from audioamigo, hobbytalk, ianfann, superreview and yoshiultra, all via squig.link.
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