Short answer: the SymphonyEars Hexad II. It ranks #842 of 1291 in-ear headphones by sound quality, rated 3.5/5, at $379; the Tangzu Nezha ranks #884, rated 3.4/5, and costs $399, so there is not much of a tradeoff to weigh.
Why pick the SymphonyEars Hexad II: A broadly balanced tuning with a preference score of 67 against the Harman target. The catch: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
What the Tangzu Nezha does well: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the SymphonyEars Hexad II. It is rated higher for sound quality than the Tangzu Nezha and costs less, 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.
A broadly balanced tuning with a preference score of 67 against the Harman target.
SymphonyEars $379 eBay
A broadly balanced tuning with a preference score of 66 against the Harman target.
Linsoul $399.00 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
| SymphonyEars Hexad II | Tangzu Nezha | |
|---|---|---|
| Price | $379 | $399.00 |
| Ranked | #842 of 1291 in In-Ear Headphones | #884 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 67 (median of 3 squig.link measurements, calibrated to AutoEQ) | 66 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.01 dB standard deviation | 2.61 dB standard deviation |
| Tonal Tilt | -0.69 (negative is warmer, positive brighter) | -0.27 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.4 dB at 30 Hz) |
| Connection | Wired (3.5mm / 4.4mm) | Wired |
| Driver Type | Balanced Armature | Hybrid (6 BA + 1 PZT) |
| Drivers | 6 Balanced Armature | 6 x balanced armature (2 Sonion subwoofers + 4 custom BA) + 1 x piezoelectric (PZT) driver |
| Impedance | - | 16 ohms |
| Sensitivity | - | 106 dB |
| Frequency Response | - | 10Hz - 20kHz |
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 SymphonyEars Hexad II from audioamigo, isaiahse, jaytiss and superreview; the Tangzu Nezha from hu-fi, lown-fi, sl0the, therollo9 and timmyv, all via squig.link.
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