Short answer: the ZhuLinNiao Z4. It ranks #215 of 1291 in-ear headphones by sound quality, rated 4.3/5, at $109; the Tin HiFi P1 Max II ranks #350, rated 4.1/5, at $109. The price gap is small enough that the sound-quality ranking should decide it.
What the ZhuLinNiao Z4 does well: Hobbyist measurements on squig.link give the Z4 a preference score of 77.3 and a smooth 1.69 dB deviation, with bass, mids and upper mids all within half a decibel of target. The catch: Sub-bass sits about 3.3 dB below target under 60 Hz, so deep synth bass and rumble are lighter than on bassier sets.
The case for the Tin HiFi P1 Max II: A planar IEM that measures well across fourteen measurements (score 75), with bass on target down to 20 Hz. The catch: At 98 dB sensitivity it needs more power than most IEMs, so a dongle DAC helps, and treble sits about 3.1 dB below target.
Buy the ZhuLinNiao Z4. It is rated higher for sound quality than the Tin HiFi P1 Max II at the same price, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Headphones rankings cover every ranked option.
Hobbyist measurements on squig.link give the Z4 a preference score of 77.3 and a smooth 1.69 dB deviation, with bass, mids and upper mids all within half a decibel of target.
Amazon $109.00 eBay
A planar IEM that measures well across fourteen measurements (score 75), with bass on target down to 20 Hz.
Amazon $109.00 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
| ZhuLinNiao Z4 | Tin HiFi P1 Max II | |
|---|---|---|
| Price | $109.00 | $109.00 |
| Ranked | #215 of 1291 in In-Ear Headphones | #350 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 77 (median of 10 squig.link measurements, calibrated to AutoEQ) | 75 (median of 14 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.69 dB standard deviation | 1.92 dB standard deviation |
| Tonal Tilt | +0.44 (negative is warmer, positive brighter) | -0.28 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Planar magnetic |
| Impedance | 32 ohms | 16 ohms |
| Sensitivity | 106 dB | 98 dB at 1 kHz |
| Frequency Response | 10Hz - 40kHz (Manufacturer specified) | - |
| Drivers | - | 1 x 14.2mm planar |
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 ZhuLinNiao Z4 from ankramutt, audioamigo, boizoff, enemyspider, hobbytalk, musicafe, obodio, pw, soundcheck39 and suporsalad; the Tin HiFi P1 Max II from arn, audioamigo, csi-zone, dl, hobbytalk, hu-fi, jaytiss, kuping-sensi, mmagtech, pw, samreviews, soundcheck39, soundignity and vortexreviews, all via squig.link.
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