Short answer: the Tripowin x HBB Kailua. It ranks #708 of 1291 in-ear headphones by sound quality, rated 3.6/5, at $28.99; the HZSOUND Luna ranks #808, rated 3.5/5, and costs $29.99, so there is not much of a tradeoff to weigh.
The case for the Tripowin x HBB Kailua: The median of 12 hobbyist measurements gives it a solid Harman preference score of 69 with a 2.17 dB spread, and its mids sit within about 0.7 dB of target, so vocals and instruments sound natural. Watch for: Presence sits about 3.3 dB low with a 5.7 dB dip near 10.0 kHz, so vocals and instruments lose some bite.
Why pick the HZSOUND Luna: A broadly balanced tuning with a preference score of 68 against the Harman target. The catch: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the Tripowin x HBB Kailua. It is rated higher for sound quality than the HZSOUND Luna and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Headphones rankings cover every ranked option.
The median of 12 hobbyist measurements gives it a solid Harman preference score of 69 with a 2.17 dB spread, and its mids sit within about 0.7 dB of target, so vocals and instruments sound natural.
Linsoul $28.99 eBay
A broadly balanced tuning with a preference score of 68 against the Harman target.
Amazon $29.99 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
| Tripowin x HBB Kailua | HZSOUND Luna | |
|---|---|---|
| Price | $28.99 | $29.99 |
| Ranked | #708 of 1291 in In-Ear Headphones | #808 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired (3.5mm) |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm DLC titanium-coated dynamic + 1 x 6mm titanium-coated dynamic | 1 Dynamic (10mm flat diaphragm) |
| Impedance | 19 ohms | - |
| Sensitivity | 106 dB/mW | - |
| Frequency Response | 12Hz - 36kHz | - |
| Harman Preference Score | 69 (median of 12 squig.link measurements, calibrated to AutoEQ) | 68 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.17 dB standard deviation | 2.31 dB standard deviation |
| Tonal Tilt | -0.69 (negative is warmer, positive brighter) | -0.69 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
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 Tripowin x HBB Kailua from achoreviews, audioamigo, bassaudio, cqtek, hbb, jaytiss, obodio, practiphile, pw, superreview, vortexreviews and vsg; the HZSOUND Luna from audioamigo, eplv, pw, soundcheck39, theaudiostore, tonedeafmonk and treblewellxtended, all via squig.link.
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