Short answer: the Campfire Audio Supermoon. It ranks #836 of 1369 in-ear headphones by sound quality, rated 3.5/5, at $899; the Unique Melody MEST MKIII ranks #903, rated 3.4/5, and costs $1,919, which makes this an easy call rather than a real tradeoff.
What the Campfire Audio Supermoon does well: A 14mm planar magnetic IEM with full sub-bass to 20 Hz and a 67 Harman score across three measurements. The catch: Expensive for its rating, and a low 94 dB sensitivity needs more volume.
Why pick the Unique Melody MEST MKIII: A broadly balanced tuning with a preference score of 66 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.
Buy the Campfire Audio Supermoon. It is rated higher for sound quality than the Unique Melody MEST MKIII and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Looking for alternatives? See the complete Headphones rankings.
A 14mm planar magnetic IEM with full sub-bass to 20 Hz and a 67 Harman score across three measurements.
Campfire Audio $899.00 eBay
A broadly balanced tuning with a preference score of 66 against the Harman target.
MusicTeck $1,919.00 eBayPrices on this page were last checked October 17, 2026 at 6:04 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
| Campfire Audio Supermoon | Unique Melody MEST MKIII | |
|---|---|---|
| Price | $899.00 | $1,919.00 |
| Ranked | #836 of 1369 in In-Ear Headphones | #903 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Planar Magnetic | Quadbrid |
| Drivers | 1 x 14mm planar magnetic | 10 drivers (1 dynamic driver + 4 balanced armatures + 4 electrostatic + 1 bone conduction driver) |
| Impedance | 15.5 ohms | 14 ohms |
| Sensitivity | 94 dB @1kHz | 104 dB |
| Harman Preference Score | 67 (median of 3 squig.link measurements, calibrated to AutoEQ) | 66 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.29 dB standard deviation | 2.64 dB standard deviation |
| Tonal Tilt | -0.60 (negative is warmer, positive brighter) | -0.63 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.3 dB at 30 Hz) |
| Frequency Response | - | 20Hz - 70kHz |
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 Campfire Audio Supermoon from bloomaudio, dchpgall and eliseaudio; the Unique Melody MEST MKIII from aden, dl, harutohiroki, hbb, kazi, musicafe, practiphile and precog, all via squig.link.
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