Short answer: a tie on sound quality. Both are rated 3.5/5 (#838 and #777 of 1291 in-ear headphones) at nearly the same price ($10 vs $9.99), so choose on features and fit.
The case for the KZ EDCX: An ultra cheap single dynamic IEM with full sub-bass to 20 Hz and a Harman preference score of 67 across five measurements. The catch: Bass sits about 3.0 dB above target, a bass heavy balance.
The case for the Sony MDR-EX15LP: 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. The catch: A 7.2 dB dip near 11.9 kHz and air about 3 dB below target take some sparkle off cymbals.
Buy the KZ EDCX or the Sony MDR-EX15LP on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete Headphones rankings.
An ultra cheap single dynamic IEM with full sub-bass to 20 Hz and a Harman preference score of 67 across five measurements.
Linsoul $10.00 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.
B&H Photo Video $11.99 Sony $9.99 Lowest 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
| KZ EDCX | Sony MDR-EX15LP | |
|---|---|---|
| Price | $10.00 | $9.99 |
| Ranked | #838 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 |
| Harman Preference Score | 67 (median of 5 squig.link measurements, calibrated to AutoEQ) | 68 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.25 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 (+1.8 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.5 dB at 30 Hz) |
| Impedance | - | 16 ohms |
| Sensitivity | - | 100 dB/mW |
| 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 EDCX from hbb, hore, ianfann, practiphile and suporsalad; the Sony MDR-EX15LP from audioamigo, hobbytalk, ianfann, superreview and yoshiultra, all via squig.link.
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