Short answer: a tie on sound quality. Both are rated 3.5/5 (#804 and #821 of 1291 in-ear headphones) at nearly the same price ($199 vs $199), so choose on features and fit.
What the Hisenior T4 does well: A broadly balanced tuning with a preference score of 68 against the Harman target. Watch for: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Why pick the Kiwi Ears KE4: Bass is clean and well controlled from the isobaric dynamic pair, landing right on target from 20 Hz upward across 37 measurements. The catch: The upper mids and presence sit about 4 to 5 dB below target, with a 7.4 dB dip near 6.5 kHz, so vocals and instruments lose bite and the sound can feel veiled.
Buy the Hisenior T4 or the Kiwi Ears KE4 on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete Headphones rankings.
A broadly balanced tuning with a preference score of 68 against the Harman target.
Amazon $199 eBay
Bass is clean and well controlled from the isobaric dynamic pair, landing right on target from 20 Hz upward across 37 measurements.
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Specifications Side By Side
| Hisenior T4 | Kiwi Ears KE4 | |
|---|---|---|
| Price | $199 | $199.00 |
| Ranked | #804 of 1291 in In-Ear Headphones | #821 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 68 (median of 6 squig.link measurements, calibrated to AutoEQ) | 67 (median of 37 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.66 dB standard deviation | 2.17 dB standard deviation |
| Tonal Tilt | +0.13 (negative is warmer, positive brighter) | -0.84 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.5 dB at 30 Hz) |
| Connection | Wired (3.5mm / 4.4mm) | Wired |
| Driver Type | Balanced Armature | Hybrid |
| Drivers | 4 Balanced Armature | 2 x 10mm dynamic (isobaric) + 2 x balanced armature |
| Impedance | - | 28 ohms |
| Sensitivity | - | 102 dB/mW |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
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 Hisenior T4 from digaoreviews, ducbloke, flare, iemocean, sl0the and soundcheck39; the Kiwi Ears KE4 from aden, aftersound, atechreviews, audioamigo, banzai1122, bloomaudio, boizoff, cammyfi, cqtek, dl, eliseaudio, filk, flare, gadgetrytech, harutohiroki, hobbytalk, iemworld, jaytiss, joshtbvo, joycesreview, kazi, kuping-sensi, listener, lown-fi, obodio, practiphile, pw, silicagel, sl0the, soundcheck39, soundignity, superreview, theaudiostore, therollo9, timmyv, treblewellxtended and vortexreviews, all via squig.link.
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