Short answer: the Aful Dawn X. It ranks #272 of 450 in-ear headphones by sound quality, rated 4.0/5, at $1,299.99. The 64 Audio U4s ranks #316, rated 3.9/5, at $1,199, $100.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
Buy the Aful Dawn X. It is rated higher for sound quality, and the $100.99 saving on the 64 Audio U4s is not enough to make up the difference.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Aful Dawn X | 64 Audio U4s | |
|---|---|---|
| Price | $1,299.99 | $1,199.00 |
| Ranked | #272 of 450 in In-Ear Headphones | #316 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 73 (median of 13 squig.link measurements, calibrated to AutoEQ) | 72 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.84 dB standard deviation | 2.23 dB standard deviation |
| Tonal Tilt | -0.68 (negative is warmer, positive brighter) | -0.30 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 8 balanced armature + 4 electrostatic + 1 bone conduction) | Hybrid (1 dynamic + 3 balanced armature) |
| Drivers | 1 x dynamic + 8 x balanced armature + 4 x electrostatic + 1 x bone conduction | 1 x dynamic + 3 x balanced armature |
| Impedance | 15 ohms | 11 ohms |
| Sensitivity | 101 dB | 107 dB/mW |
| Frequency Response | 5Hz - 35kHz (Manufacturer specified) | 10Hz - 20kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
Related Headphone Comparisons
How Aful Dawn X compares with other leading options:
- DUNU Glacier vs Aful Dawn X
- ThieAudio Prestige LTD vs Aful Dawn X
- Aful Dawn X vs Kinera Verdandi
- Kinera Verdandi vs 64 Audio U4s
- 64 Audio U4s vs ThieAudio V16 Divinity
Prices on this page were last checked October 11, 2026 at 4:59 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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The Two Headphones In Full
Aful Dawn X: $1,299.99 HiFiGo eBay
Full Aful Dawn X review and specifications →
| Released | Jul 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.84 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 8 balanced armature + 4 electrostatic + 1 bone conduction) |
| Drivers | 1 x dynamic + 8 x balanced armature + 4 x electrostatic + 1 x bone conduction |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 35kHz (Manufacturer specified) |
| Harman Preference Score | 73 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 15 ohms |
| Sensitivity | 101 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.4 dB at 30 Hz) |
| Tonal Tilt | -0.68 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
64 Audio U4s: $1,199.00 64 Audio eBay
Full 64 Audio U4s review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.23 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 3 balanced armature) |
| Drivers | 1 x dynamic + 3 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 72 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 11 ohms |
| Sensitivity | 107 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) |
| Tonal Tilt | -0.30 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons