Short answer: the FiiO EH11. It ranks #97 of 216 over-ear headphones by sound quality, rated 3.8/5, at $29.99; the Superlux HD 681 ranks #165, rated 3.1/5, and costs $33.29, so there is not much of a tradeoff to weigh.
The FiiO EH11 is the better-sounding choice.
The case for the Superlux HD 681: 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. Watch for: 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 FiiO EH11. It is rated higher for sound quality than the Superlux HD 681 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| FiiO EH11 | Superlux HD 681 | |
|---|---|---|
| Price | $29.99 | $33.29 |
| Ranked | #97 of 216 in Over-Ear Headphones | #165 of 216 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 78 (median of 3 squig.link measurements, calibrated to AutoEQ) | 61 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.46 dB standard deviation | 2.58 dB standard deviation |
| Tonal Tilt | +0.30 (negative is warmer, positive brighter) | +1.34 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 42 Hz (-10.7 dB at 30 Hz) | Falls 6 dB below target at 42 Hz (-9.8 dB at 30 Hz) |
| Connection | Wireless | Wired |
| Back | Semi-open | Semi-open |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 40mm dynamic | 1 x 50mm dynamic |
| Impedance | 16 ohms | 32 ohms |
| Weight | 0.2 lbs (92 g) | 0.5 lbs (230 g) |
| Frequency Response | 17Hz - 40kHz (Manufacturer specified) | 10Hz - 30kHz (Manufacturer specified) |
| Battery Life | 30 hours (Manufacturer specified) | - |
| Bluetooth Version | 6.0 | - |
| Bluetooth Codecs | SBC, AAC, LDAC | - |
| Built-in Microphone | Yes | No |
| Active Noise Cancelling | No | - |
| Sensitivity | - | 98 dB/mW |
Related Headphone Comparisons
How FiiO EH11 compares with other leading options:
- Superlux HD 660 Pro 150 Ohm vs FiiO EH11
- FiiO EH11 vs Koss KPH30i
- Koss KPH30i vs Superlux HD 681
- Superlux HD 660 Pro 150 Ohm vs Superlux HD 681
- Superlux HD 681 vs Koss KPH40
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Headphones In Full
FiiO EH11: $29.99 Wireless Amazon eBay
Full FiiO EH11 review and specifications →
| Released | 2026 (this year) |
|---|---|
| Active Noise Cancelling | No |
| Back | Semi-open |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 6.0 |
| Built-in Microphone | Yes |
| Connection | Wireless |
| Deviation From Target | 2.46 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 40mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 17Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 78 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 16 ohms |
| Sub-bass Extension | Falls 6 dB below target at 42 Hz (-10.7 dB at 30 Hz) |
| Tonal Tilt | +0.30 (negative is warmer, positive brighter) |
| Weight | 0.2 lbs (92 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Superlux HD 681: $33.29 B&H Photo Video eBay
Pros: 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. From the upper midrange through the air band its response stays within 2 dB of target on average, which suits listeners who like a bright or studio-flat balance. It rates higher than the Koss KPH40 at a similar price.
Cons: 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. A 5.7 dB peak at 4.8 kHz right next to a 5.1 dB dip at 4.1 kHz can make vocals and guitars edgy, and the semi-open back lets some sound escape. The AKG K240 Studio and HyperX Cloud Alpha rate higher for a little more money.
Full Superlux HD 681 review and specifications →
| Back | Semi-open |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.58 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 50mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 10Hz - 30kHz (Manufacturer specified) |
| Harman Preference Score | 61 (measured by oratory1990, via AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 98 dB/mW |
| Sub-bass Extension | Falls 6 dB below target at 42 Hz (-9.8 dB at 30 Hz) |
| Tonal Tilt | +1.34 (negative is warmer, positive brighter) |
| Weight | 0.5 lbs (230 g) |
EQ preset to match the Harman target
Set a preamp of -5.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.8 dB | 0.70 |
| Peak | 496 Hz | +2.4 dB | 1.05 |
| Peak | 1,105 Hz | -1.8 dB | 0.57 |
| Peak | 5,194 Hz | -6.1 dB | 4.12 |
| Peak | 174 Hz | +1.0 dB | 1.11 |
| High shelf | 10,000 Hz | -3.2 dB | 0.70 |
| Peak | 7,758 Hz | -2.3 dB | 3.68 |
| Peak | 3,826 Hz | +3.2 dB | 5.94 |
| Peak | 2,458 Hz | -1.4 dB | 3.46 |
| Peak | 65 Hz | -0.5 dB | 2.20 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons