Short answer: the Oriolus Monachaa. It ranks #553 of 1291 in-ear headphones by sound quality, rated 3.8/5, at $2,000. The Elysian Apostle ranks #663, rated 3.7/5, at $1,799, $201 cheaper, which does not close the gap in sound quality.
The case for the Oriolus Monachaa: An all dynamic IEM with four dynamic drivers per side. The tradeoff: It is sold mainly through European dealers.
Why pick the Elysian Apostle: A tribrid flagship with a dynamic driver, two balanced armatures and two electrostatic tweeters. The tradeoff: Treble sits about 4.5 dB below target, a dark, relaxed balance.
Buy the Oriolus Monachaa. It is rated higher for sound quality, and the $201 saving on the Elysian Apostle is not enough to make up the difference.
Want more options? Browse the full Headphones rankings.
An all dynamic IEM with four dynamic drivers per side.
Audio Essence eBay
A tribrid flagship with a dynamic driver, two balanced armatures and two electrostatic tweeters.
Bloom Audio $1,799.00 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 Monachaa | Elysian Apostle | |
|---|---|---|
| Price | $2,000 | $1,799.00 |
| Ranked | #553 of 1291 in In-Ear Headphones | #663 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Tribrid |
| Drivers | 4 x dynamic | 1 x dynamic + 2 x balanced armature + 2 x electrostatic |
| Impedance | 24 ohms | 10 ohms |
| Sensitivity | 111 dB SPL/mW | 97 dB @1kHz |
| Harman Preference Score | 72 (median of 4 squig.link measurements, calibrated to AutoEQ) | 70 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.97 dB standard deviation | 2.32 dB standard deviation |
| Tonal Tilt | -0.54 (negative is warmer, positive brighter) | -0.51 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+3.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.0 dB at 30 Hz) |
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 Monachaa from dchpgall, hbb, jaytiss and smirk; the Elysian Apostle from aden, eliseaudio, harutohiroki, pw, smirk, soundignity and zerostresslevel, all via squig.link.
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