The Fidue A91 Sirius ranks #92 out of 115 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
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#92 Fidue A91 Sirius: $899.99 Amazon eBay
Pros: A hybrid of one dynamic driver and four balanced armatures per side offers a multi-driver layout for listeners who want one. Its rating sits above the FiiO FA7S, which costs slightly more. No amp is needed, since the 113 dB sensitivity gives plenty of volume from a phone.
Cons: A preference score of 53 in crinacle’s measurement places its tuning far from what most listeners prefer. The Kinera Skuld and Audio-Technica ATH-CK2000Ti are both rated higher and cost noticeably less, and there is no microphone for calls.
| Released | Jun 2016 (10 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 4.06 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 4Hz - 45kHz (Manufacturer specified) |
| Harman Preference Score | 53 (measured by crinacle, via AutoEQ) |
| Sensitivity | 113 dB |
| Tonal Tilt | +0.13 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -7.3 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.5 dB | 0.70 |
| Peak | 9,827 Hz | +5.4 dB | 1.70 |
| Peak | 168 Hz | -4.0 dB | 0.65 |
| Peak | 4,982 Hz | +5.4 dB | 1.22 |
| Peak | 1,608 Hz | -6.0 dB | 3.14 |
| High shelf | 10,000 Hz | +4.6 dB | 0.70 |
| Peak | 859 Hz | +3.0 dB | 1.73 |
| Peak | 331 Hz | -1.0 dB | 1.86 |
| Peak | 1,257 Hz | -2.3 dB | 3.72 |
| Peak | 9,483 Hz | -2.7 dB | 4.60 |
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