Short answer: the Campfire Audio Supermoon. It ranks #835 of 1291 in-ear headphones by sound quality, rated 3.5/5, at $899; the DUNU Zen Pro ranks #867, rated 3.4/5, and costs $899.99, 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.
What the DUNU Zen Pro does well: A single dynamic driver with bass, low mids and upper mids all within half a dB of target in squig.link’s hobbyist measurements, so voices and instruments keep a natural, even body. The tradeoff: An 8.3 dB dip near 6.4 kHz and a 4 dB shortfall across 3 to 10 kHz dull cymbals and blunt the edge of vocals, while a 4.6 dB peak near 11.5 kHz adds a little uneven sparkle.
Buy the Campfire Audio Supermoon. It is rated higher for sound quality than the DUNU Zen Pro and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full 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 single dynamic driver with bass, low mids and upper mids all within half a dB of target in squig.link’s hobbyist measurements, so voices and instruments keep a natural, even body.
HiFiGo $899.99 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
| Campfire Audio Supermoon | DUNU Zen Pro | |
|---|---|---|
| Price | $899.00 | $899.99 |
| Ranked | #835 of 1291 in In-Ear Headphones | #867 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Planar Magnetic | Dynamic |
| Drivers | 1 x 14mm planar magnetic | - |
| Impedance | 15.5 ohms | 16 ohms |
| Sensitivity | 94 dB @1kHz | 112 dB |
| Harman Preference Score | 67 (median of 3 squig.link measurements, calibrated to AutoEQ) | 66 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.29 dB standard deviation | 3.11 dB standard deviation |
| Tonal Tilt | -0.60 (negative is warmer, positive brighter) | -0.11 (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 (-3.7 dB at 30 Hz) |
| Frequency Response | - | 5Hz - 40kHz (Manufacturer specified) |
| Built-in Microphone | - | No |
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 DUNU Zen Pro from aden, aftersound, ankramutt, bukanaudiophile, ekaudio, joshtbvo, kazi, koi, musicafe, nymz, precog, superreview, tedthepraimortis, tgx78 and vsg, all via squig.link.
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