Short answer: the Moondrop Old Fashioned. It ranks #321 of 481 over-ear headphones by sound quality, rated 3.1/5, at $24.99. The Koss KSC75 ranks #382, rated 2.8/5, at $19.99, $5 cheaper, which does not close the gap in sound quality.
The Moondrop Old Fashioned is the better-sounding pick. Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural. The tradeoff: A 4.8 dB peak near 3.2 kHz can make cymbals and sibilance sound sharp.
Why pick the Koss KSC75: An extremely low cost and a featherweight 0.1 lbs (43 g) clip-on design make it easy to carry and wear for long stretches. The tradeoff: Sub-bass is about 17 dB below target under 60 Hz, so there is almost no rumble and bass-heavy music sounds thin.
Buy the Moondrop Old Fashioned. It is rated higher for sound quality, and the $5 saving on the Koss KSC75 is not enough to make up the difference.
Still deciding? The full Headphones rankings cover every ranked option.
Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural.
Amazon $24.99 eBay
An extremely low cost and a featherweight 43 g clip-on design make it easy to carry and wear for long stretches.
Amazon $19.99 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
| Moondrop Old Fashioned | Koss KSC75 | |
|---|---|---|
| Price | $24.99 | $19.99 |
| Ranked | #321 of 481 in Over-Ear Headphones | #382 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Back | Open | Open |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 40mm dynamic | 1 x 35mm dynamic |
| Impedance | 32 ohms | 60 ohms |
| Sensitivity | 109 dB/Vrms | 101 dB SPL/1mW |
| Frequency Response | 20Hz - 32kHz | 15Hz - 25kHz (Manufacturer specified) |
| Harman Preference Score | 63 (median of 5 squig.link measurements, calibrated to AutoEQ) | 54 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 3.40 dB standard deviation | 3.33 dB standard deviation |
| Tonal Tilt | +0.55 (negative is warmer, positive brighter) | +1.22 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 75 Hz (-18.2 dB at 30 Hz) | Falls 6 dB below target at 67 Hz (-19.2 dB at 30 Hz) |
| Weight | - | 0.1 lbs (43 g) |
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 Moondrop Old Fashioned from audioamigo, daemonxar, kr0mka, listener and superreview; the Koss KSC75 from aden, audioamigo, capraaudio, filk, hadoe, kr0mka, listener, ragnarok, sai, superreview, suporsalad and therollo9, all via squig.link.
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