Short answer: a tie on sound quality. Both are rated 4.3/5 (#184 and #209 of 1291 in-ear headphones) at nearly the same price ($55.99 vs $59), so choose on features and fit.
What the KZ ZEX Pro does well: The median of 20 hobbyist measurements gives it a very good Harman preference score of 78 with a 1.60 dB spread. The catch: Presence sits about 3.2 dB low with a 6.6 dB dip near 11.9 kHz, so vocals and instruments lose some bite.
What the Tin HiFi T3 Plus does well: Crinacle’s measurement gives a preference score of 77 with only 1.78 dB of deviation around the target, an unusually smooth response for an inexpensive in-ear. Watch for: Presence and treble sit about 2 dB under target with a 5.7 dB dip near 6.3 kHz in the squig.link measurements, which softens cymbals and sibilance for a slightly relaxed sound.
Buy the KZ ZEX Pro or the Tin HiFi T3 Plus on features: they are rated the same for sound quality at close to the same price.
Still deciding? The full Headphones rankings cover every ranked option.
The median of 20 hobbyist measurements gives it a very good Harman preference score of 78 with a 1.60 dB spread.
Amazon $55.99 eBay
Crinacle’s measurement gives a preference score of 77 with only 1.78 dB of deviation around the target, an unusually smooth response for an inexpensive in-ear.
Amazon $59.00 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
| KZ ZEX Pro | Tin HiFi T3 Plus | |
|---|---|---|
| Price | $55.99 | $59.00 |
| Ranked | #184 of 1291 in In-Ear Headphones | #209 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 78 (median of 20 squig.link measurements, calibrated to AutoEQ) | 77 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 1.60 dB standard deviation | 1.78 dB standard deviation |
| Tonal Tilt | -0.27 (negative is warmer, positive brighter) | -0.41 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature + 1 electrostatic) | Dynamic |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature + 1 x electrostatic | 1 x 10mm dynamic |
| Impedance | 25 ohms | 32 ohms |
| Sensitivity | 104 dB | 105 dB @ 1kHz, 0.179V |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 10Hz - 20kHz (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 ZEX Pro from achoreviews, aftersound, ankramutt, bassyalexander, boizoff, dchpgall, dentreviews, eplv, filk, flare, hbb, ianfann, jacstone, loomynarty, lown-fi, precog, recode, rg, tgx78 and vortexreviews; the Tin HiFi T3 Plus from achoreviews, aftersound, ankramutt, arc, avishai, bedrock, bryaudioreviews, eplv, hbb, hu-fi, ianfann, jacstone, musicafe, obodio, pw, rg, superreview, timmyv and vortexreviews, all via squig.link.
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