Short answer: the Noble Audio Viking Ragnar, though neither ranks well in its class. It ranks #1098 of 1291 in-ear headphones by sound quality, rated 2.5/5, at $4,000. The 64 Audio U18t ranks #1217, rated 1.5/5, at $2,999, $1,001 cheaper, not enough of a saving to outweigh the sound-quality gap. Both are rated below 3.0/5 among the 1291 in-ear headphones, and the ThieAudio Monarch MKIII, ranked #1 at $999, is a better place to start if sound quality matters.
The Noble Audio Viking Ragnar is the better-sounding choice. Lower mids sit within about 0.7 dB of target, keeping voices and guitars natural. The tradeoff: Presence sits about 7.7 dB low with a 10.2 dB dip near 4.2 kHz, so vocals and instruments lose some bite.
What the 64 Audio U18t does well: Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural. Watch for: Presence sits about 10.7 dB low with a 13.8 dB dip near 11.7 kHz, so vocals and instruments lose some bite.
Buy the Noble Audio Viking Ragnar. It is rated higher for sound quality, and saving $1,001 with the 64 Audio U18t does not make up for the sound-quality gap.
Looking for alternatives? See the complete Headphones rankings.
Lower mids sit within about 0.7 dB of target, keeping voices and guitars natural.
Headphones.com $4,000.00 eBay
Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural.
Headphones.com $2,999 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
| Noble Audio Viking Ragnar | 64 Audio U18t | |
|---|---|---|
| Price | $4,000.00 | $2,999 |
| Ranked | #1098 of 1291 in In-Ear Headphones | #1217 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Connection | Wired | Wired |
| Driver Type | Tribrid | Balanced armature |
| Drivers | 2 x dynamic, 4 x balanced armature, 4 x electrostatic | 18 x balanced armature |
| Impedance | 17 ohms | 9 ohms |
| Frequency Response | 20Hz - 40kHz | 10Hz - 20kHz |
| Harman Preference Score | 55 (measured by HypetheSonics, via AutoEQ) | 43 (measured by HypetheSonics, via AutoEQ) |
| Deviation From Target | 3.34 dB standard deviation | 4.38 dB standard deviation |
| Tonal Tilt | +0.60 (negative is warmer, positive brighter) | -0.97 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.4 dB at 30 Hz) | Falls 6 dB below target at 30 Hz (-6.1 dB at 30 Hz) |
| Sensitivity | - | 111 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 Noble Audio Viking Ragnar from aden, bloomaudio, dchpgall and vsg; the 64 Audio U18t from breampike, lumerion, precog, recode, superreview, therollo9 and vsg, all via squig.link.
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