Short answer: the Hisenior Mega5EST 7th Anniversary Edition. It ranks #394 of 1291 in-ear headphones by sound quality, rated 4.0/5, at $549; the FiiO FH9 ranks #594, rated 3.8/5, and costs $559.99, so there is little reason to consider the other one.
What the Hisenior Mega5EST 7th Anniversary Edition does well: The median of 4 hobbyist measurements gives it a solid Harman preference score of 74 with a 1.73 dB spread. Watch for: Presence sits about 4.3 dB low with a 5.5 dB dip near 5.1 kHz, so vocals and instruments lose some bite.
The case for the FiiO FH9: A hybrid flagship with a 13.6mm DLC dynamic driver and six Knowles balanced armatures. The tradeoff: A 2.35 dB spread from the target shows peaks and dips that better tuned sets avoid.
Buy the Hisenior Mega5EST 7th Anniversary Edition. It is rated higher for sound quality than the FiiO FH9 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Headphones rankings cover every ranked option.
The median of 4 hobbyist measurements gives it a solid Harman preference score of 74 with a 1.73 dB spread.
Amazon $549.00 eBay
A hybrid flagship with a 13.6mm DLC dynamic driver and six Knowles balanced armatures.
Amazon $559.99 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Hisenior Mega5EST 7th Anniversary Edition | FiiO FH9 | |
|---|---|---|
| Price | $549.00 | $559.99 |
| Ranked | #394 of 1291 in In-Ear Headphones | #594 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 74 (median of 4 squig.link measurements, calibrated to AutoEQ) | 71 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.73 dB standard deviation | 2.35 dB standard deviation |
| Tonal Tilt | -0.67 (negative is warmer, positive brighter) | -0.14 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.0 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.2 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 2 balanced armature + 2 electrostatic) | Hybrid |
| Drivers | 1 x 10mm dynamic + 2 x balanced armature + 2 x electrostatic | 1 x 13.6mm dynamic + 6 x Knowles balanced armature |
| Impedance | - | 18 ohms |
| Sensitivity | - | 108 dB/mW |
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 Hisenior Mega5EST 7th Anniversary Edition from atechreviews, audioamigo, ducbloke, flare, hbb, obodio and zerostresslevel; the FiiO FH9 from ekaudio, jaytiss and therollo9, all via squig.link.
Related Headphone Comparisons
More top alternatives to Hisenior Mega5EST 7th Anniversary Edition:
- Oriolus Isabellae vs Hisenior Mega5EST 7th Anniversary Edition
- EPZ 550 vs Hisenior Mega5EST 7th Anniversary Edition
- Fearless Audio S8Z vs Hisenior Mega5EST 7th Anniversary Edition
- Hisenior Mega5EST 7th Anniversary Edition vs TIMSOK TS-316
- Hisenior Mega5EST 7th Anniversary Edition vs Night Oblivion Butastur