Short answer: the Myer Audio SLIIVO SL224. Both are rated 4.7/5 for sound quality (#57 and #54 of 1291 in-ear headphones), and the Myer Audio SLIIVO SL224 costs $319.99 against $349.99 for the Moondrop Harmon, and with sound quality even, the cheaper one is the better buy.
The case for the Moondrop Harmon: Across 10 hobbyist measurements on squig.link it scores 82 for preference, with bass held within about half a decibel of target down to 20 Hz, so low end is clean and controlled. Watch for: A deep 6.9 dB dip near 10.3 kHz and treble about 2 dB under target from 6 to 10 kHz make cymbals and acoustic detail sound subdued.
Why pick the Myer Audio SLIIVO SL224: The best-measuring model of this group: a score of 82 across six measurements with a very tight 1.21 dB spread from the Harman target. The tradeoff: Treble sits about 1.9 dB below target, a touch smooth, and Myer Audio is sold through a small number of dealers.
Buy the Myer Audio SLIIVO SL224. Both are rated the same for sound quality, and it costs $30 less than the Moondrop Harmon.
Looking for alternatives? See the complete Headphones rankings.
Across 10 hobbyist measurements on squig.link it scores 82 for preference, with bass held within about half a decibel of target down to 20 Hz, so low end is clean and controlled.
Amazon $349.99 eBay
The best-measuring model of this group: a score of 82 across six measurements with a very tight 1.21 dB spread from the Harman target.
Hangout.Audio $319.99 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 Harmon | Myer Audio SLIIVO SL224 | |
|---|---|---|
| Price | $349.99 | $319.99 |
| Ranked | #54 of 1291 in In-Ear Headphones | #57 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 82 (median of 10 squig.link measurements, calibrated to AutoEQ) | 82 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.34 dB standard deviation | 1.21 dB standard deviation |
| Tonal Tilt | -0.26 (negative is warmer, positive brighter) | -0.21 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.8 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Multi-driver |
| Drivers | 3 x 10mm dynamic | 2 x dynamic + 2 x balanced armature + 4 x micro planar |
| Impedance | 19 ohms | 36 ohms |
| Sensitivity | 114 dB/Vrms | 108 dB/Vrms |
| Frequency Response | 10Hz - 60kHz (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 Moondrop Harmon from atechreviews, audioamigo, csi-zone, hu-fi, jaytiss, koi, sl0the, soundignity, superreview and theaudiostore; the Myer Audio SLIIVO SL224 from atechreviews, audioamigo, awsmdanny, boizoff, enemyspider, jaytiss, koi, soundcheck39 and tonedeafmonk, all via squig.link.
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