Short answer: the Superlux HD 668B. It ranks #29 of 481 over-ear headphones by sound quality, rated 4.3/5, at $49.99; the ROSESELSA Distant Mountain ranks #223, rated 3.6/5, and costs $55.99, so there is little reason to consider the other one.
The Superlux HD 668B is the better-sounding pick. Measured response gives it an excellent Harman preference score of 89 with a 1.75 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural. Watch for: A 7.3 dB peak near 5.6 kHz can make cymbals and sibilance sound sharp.
What the ROSESELSA Distant Mountain does well: A broadly balanced tuning with a preference score of 73 against the Harman target. The tradeoff: About 5 dB less bass than the Harman target below 150 Hz, which can sound thin on pop, hip hop and electronic music.
Buy the Superlux HD 668B. It is rated higher for sound quality than the ROSESELSA Distant Mountain and costs less, which makes it the one to get unless you need something the other one does better.
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Measured response gives it an excellent Harman preference score of 89 with a 1.75 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural.
Amazon $49.99 eBay
A broadly balanced tuning with a preference score of 73 against the Harman target.
ROSESELSA $55.99 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.
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Specifications Side By Side
| Superlux HD 668B | ROSESELSA Distant Mountain | |
|---|---|---|
| Price | $49.99 | $55.99 |
| Ranked | #29 of 481 in Over-Ear Headphones | #223 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Back | Open | Open |
| Connection | Wired | Wired (3.5mm) |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 50mm dynamic | 1 Dynamic (40mm) |
| Impedance | 56 ohms | - |
| Sensitivity | 98 dB/mW | - |
| Frequency Response | 10Hz - 30kHz | - |
| Weight | 0.5 lbs (222 g) | - |
| Harman Preference Score | 89 (measured by oratory1990, via AutoEQ) | 73 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.75 dB standard deviation | 2.78 dB standard deviation |
| Tonal Tilt | +0.19 (negative is warmer, positive brighter) | +0.35 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 42 Hz (-11.5 dB at 30 Hz) | Falls 6 dB below target at 36 Hz (-8.1 dB at 30 Hz) |
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