Short answer: the YU9 Audio Que. Both are rated 4.1/5 for sound quality (#344 and #321 of 1291 in-ear headphones), and the YU9 Audio Que costs $539 against $600 for the Oriolus Isabellae, so with nothing between them on sound quality, price settles it.
What the Oriolus Isabellae does well: A single 9.8mm dynamic driver earns a preference score of 75 from crinacle, and squig.link measurements show a 3.2 dB upper bass lift that gives a warm, punchy foundation without bloating the mids. The catch: Across hobbyist measurements a 7 dB peak near 11.2 kHz adds sparkle that can tip into sibilance or splash on bright recordings.
The case for the YU9 Audio Que: The median of 22 hobbyist measurements gives it a very good Harman preference score of 75 with a 1.81 dB spread, and its mids sit within about 1.1 dB of target, so vocals and instruments sound natural. The tradeoff: Presence sits about 4.3 dB low with a 6.8 dB dip near 5.6 kHz, so vocals and instruments lose some bite.
Buy the YU9 Audio Que. Both are rated the same for sound quality, and it costs $61 less than the Oriolus Isabellae.
Looking for alternatives? See the complete Headphones rankings.
A single 9.8mm dynamic driver earns a preference score of 75 from crinacle, and squig.link measurements show a 3.2 dB upper bass lift that gives a warm, punchy foundation without bloating the mids.
Shenzhenaudio $600.00 eBay
The median of 22 hobbyist measurements gives it a very good Harman preference score of 75 with a 1.81 dB spread, and its mids sit within about 1.1 dB of target, so vocals and instruments sound natural.
Hangout.Audio $539 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
| Oriolus Isabellae | YU9 Audio Que | |
|---|---|---|
| Price | $600.00 | $539 |
| Ranked | #321 of 1291 in In-Ear Headphones | #344 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 75 (measured by crinacle, via AutoEQ) | 75 (median of 22 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.14 dB standard deviation | 1.81 dB standard deviation |
| Tonal Tilt | +0.11 (negative is warmer, positive brighter) | -0.44 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid |
| Drivers | 1 x 9.8mm dynamic | 1 x dynamic + 3 x balanced armature |
| Impedance | 30 ohms | 9 ohms |
| Sensitivity | 113 dB | 126 dB/Vrms |
| Frequency Response | 10Hz - 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 Oriolus Isabellae from aden, jaytiss, lestat, mmagtech, musicafe, precog, pw and sl0the; the YU9 Audio Que from aden, aftersound, animagus, atechreviews, audioamigo, banzai1122, bassaudio, dl, doltonius, eliseaudio, enemyspider, flare, jaytiss, koi, lestat, listener, practiphile, precog, pw, smirk, superreview and zerostresslevel, all via squig.link.
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