Short answer: the Kefine Klean. It ranks #84 of 450 in-ear headphones by sound quality, rated 4.5/5, at $53.61; the TRN Medusa ranks #100, rated 4.4/5, and costs $53.99, so there is little reason to consider the other one.
The case for the Kefine Klean: Four squig.link measurements give the Klean a preference score of 79.4 with a very smooth 1.32 dB deviation from target. The catch: A 5 dB dip near 9.9 kHz dulls the shimmer of cymbals and strings, and presence sits 1.9 dB below target, softening vocal edges.
What the TRN Medusa does well: Thirteen hobbyist measurements on squig.link put the Medusa at a preference score of 78.7, with a single 12mm dynamic driver that holds bass almost exactly on target down to 30 Hz. The tradeoff: The air band runs about 6.5 dB above target and peaks 8.6 dB near 11.9 kHz, so it can sound hissy and fatiguing with bright mixes or at high volume.
Buy the Kefine Klean. It is rated higher for sound quality than the TRN Medusa and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| Kefine Klean | TRN Medusa | |
|---|---|---|
| Price | $53.61 | $53.99 |
| Ranked | #84 of 450 in In-Ear Headphones | #100 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 79 (median of 4 squig.link measurements, calibrated to AutoEQ) | 79 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.32 dB standard deviation | 1.55 dB standard deviation |
| Tonal Tilt | -0.39 (negative is warmer, positive brighter) | +0.10 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.0 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.2 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 12mm dynamic |
| Impedance | 32 ohms | 30 ohms |
| Sensitivity | 107 dB | 108 dB |
| Weight | 0 lbs (10 g) | 0 lbs (5.1 g) per earbud |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
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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
Kefine Klean: $53.61 Amazon eBay
Pros: Four squig.link measurements give the Klean a preference score of 79.4 with a very smooth 1.32 dB deviation from target. Sub-bass 1.3 dB and bass 2.1 dB above target give it a warm, rich low end that suits bassy tastes, while mids stay close to neutral. At 32 ohms and 107 dB it plays well from a phone, and it weighs 10 g.
Cons: A 5 dB dip near 9.9 kHz dulls the shimmer of cymbals and strings, and presence sits 1.9 dB below target, softening vocal edges. It costs more than the equally rated KZ Duonic and Sivga SM100.
Full Kefine Klean review and specifications →
| Released | Oct 2024 (2 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.32 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 79 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 107 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.0 dB at 30 Hz) |
| Tonal Tilt | -0.39 (negative is warmer, positive brighter) |
| Weight | 0 lbs (10 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
TRN Medusa: $53.99 Amazon eBay
Pros: Thirteen hobbyist measurements on squig.link put the Medusa at a preference score of 78.7, with a single 12mm dynamic driver that holds bass almost exactly on target down to 30 Hz. Midbass sits 1.7 dB above target for punchy drums, while vocals in the 1 to 3 kHz range come through clearly. It weighs 5.1 g per earbud and its 30 ohm, 108 dB load is easy for any phone.
Cons: The air band runs about 6.5 dB above target and peaks 8.6 dB near 11.9 kHz, so it can sound hissy and fatiguing with bright mixes or at high volume. It costs a little more than the equally rated KBEAR KB02 and CCA Pianist.
Full TRN Medusa review and specifications →
| Released | 2024 (2 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.55 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 12mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 79 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 30 ohms |
| Sensitivity | 108 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.2 dB at 30 Hz) |
| Tonal Tilt | +0.10 (negative is warmer, positive brighter) |
| Weight | 0 lbs (5.1 g) per earbud |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons