Short answer: the Moondrop Edge. It ranks #286 of 483 over-ear headphones by sound quality, rated 3.3/5, at $9.99; the Koss KSC75 ranks #384, rated 2.8/5, and costs $19.99, which makes this an easy call rather than a real tradeoff.
The Moondrop Edge is the better-sounding pick. A broadly balanced tuning with a preference score of 67 against the Harman target. The tradeoff: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
What the Koss KSC75 does well: 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. Watch for: 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 Edge. It is rated higher for sound quality than the Koss KSC75 and costs less, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphones rankings cover every ranked option.
A broadly balanced tuning with a preference score of 67 against the Harman target.
Moondrop 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 17, 2026 at 6:04 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 Edge | Koss KSC75 | |
|---|---|---|
| Price | 9.99 | $19.99 |
| Ranked | #286 of 483 in Over-Ear Headphones | #384 of 483 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 67 (median of 4 squig.link measurements, calibrated to AutoEQ) | 54 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.57 dB standard deviation | 3.33 dB standard deviation |
| Tonal Tilt | -0.93 (negative is warmer, positive brighter) | +1.22 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.8 dB at 30 Hz) | Falls 6 dB below target at 67 Hz (-19.2 dB at 30 Hz) |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 40mm beryllium-plated dynamic driver | 1 x 35mm dynamic |
| Bluetooth Version | 5.4 | - |
| Bluetooth Codecs | LDAC, AAC, SBC | - |
| Active Noise Cancelling | Yes | - |
| Battery Life | 48 hours | - |
| Weight | 0.5 lbs (220 g) | 0.1 lbs (43 g) |
| Connection | Wireless | Wired |
| Back | - | Open |
| Impedance | - | 60 ohms |
| Sensitivity | - | 101 dB SPL/1mW |
| Frequency Response | - | 15Hz - 25kHz (Manufacturer specified) |
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 Edge from listener, superreview, suporsalad and therollo9; 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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