Short answer: the iBasso SR1, though neither ranks well in its class. It ranks #465 of 481 over-ear headphones by sound quality, rated 1.5/5, at $399; the Dan Clark Audio Aeon Flow Open ranks #469, rated 1.2/5, and costs $799.99, so there is little reason to consider the other one. Both are rated below 3.0/5 among the 481 over-ear headphones, and the HIFIMAN Ananda Nano, ranked #6 at $319, is a better place to start if sound quality matters.
The iBasso SR1 is the better-sounding pick. A low 22 ohm impedance means the 50 mm dynamic driver runs from a phone or laptop without a separate amp. The catch: Crinacle’s measurement gives it a preference score of only 25, with a steep warm tilt and large deviations of about 4.5 dB on average from the Harman target, so most listeners will hear a muffled, uneven balance.
The case for the Dan Clark Audio Aeon Flow Open: It uses 1 x planar magnetic with an easy 13 ohm load. Watch for: A tonal tilt of -2.39 makes it sound dark, with bass well ahead of the treble.
Buy the iBasso SR1. It is rated higher for sound quality than the Dan Clark Audio Aeon Flow Open and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Headphones rankings cover every ranked option.
A low 22 ohm impedance means the 50 mm dynamic driver runs from a phone or laptop without a separate amp.
Amazon $399.00 eBay
It uses 1 x planar magnetic with an easy 13 ohm load.
Audio46 $799.99 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
| iBasso SR1 | Dan Clark Audio Aeon Flow Open | |
|---|---|---|
| Price | $399.00 | $799.99 |
| Ranked | #465 of 481 in Over-Ear Headphones | #469 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 25 (measured by crinacle, via AutoEQ) | 18 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 4.48 dB standard deviation | 4.72 dB standard deviation |
| Tonal Tilt | -2.12 (negative is warmer, positive brighter) | -2.39 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Back | Semi-open | Open |
| Driver Type | Dynamic | Planar magnetic |
| Drivers | 1 x 50mm dynamic | 1 x planar magnetic |
| Impedance | 22 ohms | 13 ohms |
| Frequency Response | 3Hz - 40kHz (Manufacturer specified) | - |
| Built-in Microphone | No | - |
| Sensitivity | 108 dB | 94 dB/mW |
| Weight | 0.9 lbs (420 g) | 0.7 lbs (321 g) |
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