Short answer: a tie on sound quality. Both are rated 3.6/5 (#705 and #708 of 1291 in-ear headphones) at nearly the same price ($29.99 vs $28.99), so choose on features and fit.
What the Moondrop Space Travel 2 does well: The median of 15 hobbyist measurements gives it a solid Harman preference score of 69 with a 2.45 dB spread, and its mids sit within about 1.3 dB of target, so vocals and instruments sound natural. The catch: Presence sits about 4.5 dB low with a 10.9 dB dip near 10.9 kHz, so vocals and instruments lose some bite.
Why pick 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.
Buy the Moondrop Space Travel 2 or the Tripowin x HBB Kailua on features: they are rated the same for sound quality at close to the same price.
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The median of 15 hobbyist measurements gives it a solid Harman preference score of 69 with a 2.45 dB spread, and its mids sit within about 1.3 dB of target, so vocals and instruments sound natural.
Amazon $29.99 eBay
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 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
| Moondrop Space Travel 2 | Tripowin x HBB Kailua | |
|---|---|---|
| Price | $29.99 | $28.99 |
| Ranked | #705 of 1291 in In-Ear Headphones | #708 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | True wireless | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 13mm dynamic | 1 x 10mm DLC titanium-coated dynamic + 1 x 6mm titanium-coated dynamic |
| Frequency Response | 20Hz - 20kHz | 12Hz - 36kHz |
| Harman Preference Score | 69 (median of 15 squig.link measurements, calibrated to AutoEQ) | 69 (median of 12 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.45 dB standard deviation | 2.17 dB standard deviation |
| Tonal Tilt | +0.07 (negative is warmer, positive brighter) | -0.69 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.3 dB at 30 Hz) |
| Bluetooth Version | 6.0 | - |
| Bluetooth Codecs | SBC, AAC | - |
| Battery Life | 7 hours (earbuds), 31 hours with case | - |
| Active Noise Cancelling | Yes | - |
| Impedance | - | 19 ohms |
| Sensitivity | - | 106 dB/mW |
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 Moondrop Space Travel 2 from aftersound, atechreviews, boizoff, csi-zone, dhrme, fernandagunsan, filk, hu-fi, jaraba, listener, lown-fi, practiphile, regancipher, soundignity and superreview; the Tripowin x HBB Kailua from achoreviews, audioamigo, bassaudio, cqtek, hbb, jaytiss, obodio, practiphile, pw, superreview, vortexreviews and vsg, all via squig.link.
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