Short answer: the ZiiGaat Cincotres. Both are rated 3.7/5 for sound quality (#683 and #670 of 1291 in-ear headphones), and the ZiiGaat Cincotres costs $242.10 against $249 for the QoA x Eir Aoi Misty Blue, with sound quality a draw, the lower price decides it.
The case for the QoA x Eir Aoi Misty Blue: A collaboration with singer Eir Aoi, with two dynamic drivers and two balanced armatures. Watch for: Treble sits about 4.4 dB below target, a dark, relaxed balance.
What the ZiiGaat Cincotres does well: The median of 14 hobbyist measurements gives it a solid Harman preference score of 69 with a 2.26 dB spread, and its mids sit within about 1.2 dB of target, so vocals and instruments sound natural. The tradeoff: Presence sits about 3.9 dB low with a 6.5 dB dip near 6.1 kHz, so vocals and instruments lose some bite.
Buy the ZiiGaat Cincotres. Both are rated the same for sound quality, and it costs $6.90 less than the QoA x Eir Aoi Misty Blue.
Still deciding? The full Headphones rankings cover every ranked option.
A collaboration with singer Eir Aoi, with two dynamic drivers and two balanced armatures.
e-earphone (JP) eBay
The median of 14 hobbyist measurements gives it a solid Harman preference score of 69 with a 2.26 dB spread, and its mids sit within about 1.2 dB of target, so vocals and instruments sound natural.
Amazon $242.10 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
| QoA x Eir Aoi Misty Blue | ZiiGaat Cincotres | |
|---|---|---|
| Price | $249 | $242.10 |
| Ranked | #670 of 1291 in In-Ear Headphones | #683 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Hybrid |
| Drivers | 2 x dynamic + 2 x balanced armature | 2 x 10mm dynamic + 3 x balanced armature |
| Impedance | 30 ohms | 11 ohms |
| Sensitivity | 105 dB +/-2 dB | - |
| Harman Preference Score | 70 (median of 6 squig.link measurements, calibrated to AutoEQ) | 69 (median of 14 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.11 dB standard deviation | 2.26 dB standard deviation |
| Tonal Tilt | -0.65 (negative is warmer, positive brighter) | -0.56 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.2 dB at 30 Hz) |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
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 QoA x Eir Aoi Misty Blue from aftersound, audioamigo, bassaudio, hu-fi, jaytiss, practiphile, pw and soundcheck39; the ZiiGaat Cincotres from aden, audioamigo, bloomaudio, boizoff, breampike, harpo, iemocean, jaytiss, koi, loomynarty, mmagtech, sl0the, soundcheck39 and timmyv, all via squig.link.
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