Short answer: the Symphonium Crimson. It ranks #323 of 450 in-ear headphones by sound quality, rated 3.8/5, at $1,499. The SeeAudio Kaguya ranks #347, rated 3.6/5, at $1,399, $100 cheaper, which does not close the gap in sound quality.
What the SeeAudio Kaguya does well: A preference score of 69 from crinacle and a 2.2 dB standard deviation give it a fairly even response for a premium hybrid. The tradeoff: A 10.8 dB peak near 10 kHz in squig.link measurements can make cymbals and hi-hats sound glassy or hissy to treble-sensitive listeners.
Buy the Symphonium Crimson. It is rated higher for sound quality, and the $100 saving on the SeeAudio Kaguya is not enough to make up the difference.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Symphonium Crimson | SeeAudio Kaguya | |
|---|---|---|
| Price | $1,499.00 | $1,399.00 |
| Ranked | #323 of 450 in In-Ear Headphones | #347 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 72 (median of 16 squig.link measurements, calibrated to AutoEQ) | 69 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 1.89 dB standard deviation | 2.22 dB standard deviation |
| Tonal Tilt | -0.88 (negative is warmer, positive brighter) | -0.56 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.8 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Balanced armature | Hybrid (4 balanced armature + 4 electrostatic) |
| Drivers | 4 x balanced armature | 4 x balanced armature + 4 x electrostatic |
| Impedance | 6.05 ohms | 28 ohms |
| Sensitivity | 106 dB/Vrms | 103 dB/mW |
| Frequency Response | 10Hz - 24kHz (Manufacturer specified) | 20Hz - 40kHz (Manufacturer specified) |
| Built-in Microphone | No | No |
Related Headphone Comparisons
How Symphonium Crimson compares with other leading options:
- ThieAudio V16 Divinity vs Symphonium Crimson
- Noble Audio Kadence vs Symphonium Crimson
- ThieAudio V16 Divinity vs SeeAudio Kaguya
- SeeAudio Kaguya vs Unique Melody MEST Mk2
- Oriolus Mellianus vs 64 Audio Tia Trio
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
Symphonium Crimson: $1,499.00 Headphones.com eBay
Full Symphonium Crimson review and specifications →
| Released | 2023 (3 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.89 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 24kHz (Manufacturer specified) |
| Harman Preference Score | 72 (median of 16 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 6.05 ohms |
| Sensitivity | 106 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.8 dB at 30 Hz) |
| Tonal Tilt | -0.88 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
SeeAudio Kaguya: $1,399.00 Linsoul eBay
Pros: A preference score of 69 from crinacle and a 2.2 dB standard deviation give it a fairly even response for a premium hybrid. Bass sits about 2 dB above target with sub-bass near neutral all the way to 20 Hz, so low notes are full without bloat. Four electrostatic tweeters add a 7.4 dB lift in the 10 to 16 kHz air region for an open, airy top end. It rates higher than both the SeeAudio Neo and the DUNU Zen Pro.
Cons: A 10.8 dB peak near 10 kHz in squig.link measurements can make cymbals and hi-hats sound glassy or hissy to treble-sensitive listeners. A 4.6 dB dip near 6 kHz slightly softens vocal consonants. The SoftEars Twilight rates higher for considerably less money.
Full SeeAudio Kaguya review and specifications →
| Released | Jan 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.22 dB standard deviation |
| Driver Type | Hybrid (4 balanced armature + 4 electrostatic) |
| Drivers | 4 x balanced armature + 4 x electrostatic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 69 (measured by crinacle, via AutoEQ) |
| Impedance | 28 ohms |
| Sensitivity | 103 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) |
| Tonal Tilt | -0.56 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.4 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 | -1.7 dB | 0.70 |
| Peak | 831 Hz | +4.2 dB | 0.74 |
| Peak | 166 Hz | -2.6 dB | 1.02 |
| Peak | 5,983 Hz | +6.4 dB | 3.01 |
| Peak | 1,483 Hz | -4.3 dB | 1.10 |
| High shelf | 10,000 Hz | -4.6 dB | 0.70 |
| Peak | 4,008 Hz | -0.9 dB | 5.06 |
| Peak | 65 Hz | +0.3 dB | 2.22 |
| Peak | 6,624 Hz | +1.1 dB | 5.93 |
| Peak | 8,597 Hz | +1.5 dB | 5.55 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons