Short answer: a tie on sound quality. Both are rated 4.1/5 (#339 and #313 of 1291 in-ear headphones) at nearly the same price ($99.99 vs $99.99), so choose on features and fit.
The case for the Moondrop Aria 2: In squig.link measurements it reaches a preference score of 75 with a smooth response, deviating only about 2 dB on average from the Harman target. The catch: A 4.8 dB dip near 6 kHz and presence about 2.8 dB below target take some bite and detail off snares and consonants.
What the Moondrop Rays does well: A hybrid of a 10mm dynamic driver and a 6mm planar magnetic driver with an inline microphone, scoring 75 on the preference scale in squig.link hobbyist measurements. The catch: Treble from 6 to 10 kHz sits about 3 dB low with a 5.7 dB dip near 10.5 kHz, so cymbals and detail sound dull and distant.
Buy the Moondrop Aria 2 or the Moondrop Rays on features: they are rated the same for sound quality at close to the same price.
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In squig.link measurements it reaches a preference score of 75 with a smooth response, deviating only about 2 dB on average from the Harman target.
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A hybrid of a 10mm dynamic driver and a 6mm planar magnetic driver with an inline microphone, scoring 75 on the preference scale in squig.link hobbyist measurements.
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Specifications Side By Side
| Moondrop Aria 2 | Moondrop Rays | |
|---|---|---|
| Price | $99.99 | $99.99 |
| Ranked | #339 of 1291 in In-Ear Headphones | #313 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 75 (median of 22 squig.link measurements, calibrated to AutoEQ) | 75 (median of 17 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.97 dB standard deviation | 1.95 dB standard deviation |
| Tonal Tilt | -0.13 (negative is warmer, positive brighter) | -0.05 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.6 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 1 planar magnetic) |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic + 1 x 6mm planar magnetic |
| Impedance | 33 ohms | 30 ohms |
| Sensitivity | 122 dB/Vrms | 120 dB SPL/Vrms |
| Frequency Response | 16Hz - 22kHz (Manufacturer specified) | 7Hz - 39kHz (Manufacturer specified) |
| Built-in Microphone | No | Yes |
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 Aria 2 from aftersound, arn, atechreviews, audioamigo, awsmdanny, csi-zone, gadgetrytech, harpo, hu-fi, ianfann, jaytiss, lown-fi, mmagtech, pw, sl0the, soundignity, superreview, theaudiostore, therollo9, timmyv, treblewellxtended and vortexreviews; the Moondrop Rays from aden, aftersound, audioamigo, bassaudio, bedrock, boizoff, csi-zone, fahryst, fernandagunsan, hu-fi, koi, practiphile, pw, soundignity, superreview, suporsalad and timmyv, all via squig.link.
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