Short answer: the Moondrop Edge. It ranks #286 of 483 over-ear headphones by sound quality, rated 3.3/5, at $9.99; the Superlux HD 681 ranks #334, rated 3.1/5, and costs $33.29, so there is not much of a tradeoff to weigh.
What the Moondrop Edge does well: 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 Superlux HD 681 does well: A very low price and a 32 ohm, 98 dB/mW load make it an easy pick for use straight from a phone or laptop. The tradeoff: Sub-bass sits 9.7 dB below target in oratory1990’s measurement and falls 6 dB short by 42 Hz, so bass sounds thin and lacks impact.
Buy the Moondrop Edge. It is rated higher for sound quality than the Superlux HD 681 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
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
A very low price and a 32 ohm, 98 dB/mW load make it an easy pick for use straight from a phone or laptop.
B&H Photo Video $33.29 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 | Superlux HD 681 | |
|---|---|---|
| Price | 9.99 | $33.29 |
| Ranked | #286 of 483 in Over-Ear Headphones | #334 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) | 61 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.57 dB standard deviation | 2.58 dB standard deviation |
| Tonal Tilt | -0.93 (negative is warmer, positive brighter) | +1.34 (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 42 Hz (-9.8 dB at 30 Hz) |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 40mm beryllium-plated dynamic driver | 1 x 50mm dynamic |
| Bluetooth Version | 5.4 | - |
| Bluetooth Codecs | LDAC, AAC, SBC | - |
| Active Noise Cancelling | Yes | - |
| Battery Life | 48 hours | - |
| Weight | 0.5 lbs (220 g) | 0.5 lbs (230 g) |
| Connection | Wireless | Wired |
| Back | - | Semi-open |
| Impedance | - | 32 ohms |
| Sensitivity | - | 98 dB/mW |
| Frequency Response | - | 10Hz - 30kHz (Manufacturer specified) |
| Built-in Microphone | - | No |
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