Short answer: the iBasso SR2, though neither ranks well in its class. Both are rated 2.6/5 for sound quality (#410 and #408 of 481 over-ear headphones), and the iBasso SR2 costs $499 against $545 for the Neumann NDH20, so with nothing between them on sound quality, price settles it. Both are rated below 3.0/5 among the 481 over-ear headphones, so if sound quality matters, consider the HIFIMAN Ananda Nano instead, ranked #6 at $319.
What the iBasso SR2 does well: An open-back over-ear headphone weighing 0.9 lbs (395 g), with 108 dB/mW sensitivity and a 24 ohm load. Watch for: A Harman score of 50 places it in the lower part of the over-ear rankings.
What the Neumann NDH20 does well: The closed back isolates well, and bass extends to 20 Hz with about 4 dB of extra weight below 200 Hz, a good fit for warm and bassy listeners. The catch: An 11.2 dB dip near 9.8 kHz in oratory1990’s measurement and air about 3.7 dB under target leave cymbals and room ambience muted, and a 3 dB recession in the upper mids pulls vocals back.
Buy the iBasso SR2. Both are rated the same for sound quality, and it costs $46 less than the Neumann NDH20.
Still deciding? The full Headphones rankings cover every ranked option.
An open-back over-ear headphone weighing 395 g, with 108 dB/mW sensitivity and a 24 ohm load.
Bloom Audio $499.00 eBay
The closed back isolates well, and bass extends to 20 Hz with about 4 dB of extra weight below 200 Hz, a good fit for warm and bassy listeners.
Amazon $545.00 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 SR2 | Neumann NDH20 | |
|---|---|---|
| Price | $499.00 | $545.00 |
| Ranked | #410 of 481 in Over-Ear Headphones | #408 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Back | Open | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Impedance | 24 ohms | 150 ohms |
| Sensitivity | 108 dB/mW | 114 dB SPL/V |
| Frequency Response | 3Hz - 40kHz | 5Hz - 30kHz (Manufacturer specified) |
| Weight | 0.9 lbs (395g) | 0.9 lbs (390 g) |
| Harman Preference Score | 50 (measured by crinacle, via AutoEQ) | 50 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 3.72 dB standard deviation | 3.45 dB standard deviation |
| Tonal Tilt | +1.13 (negative is warmer, positive brighter) | -1.36 (negative is warmer, positive brighter) |
| Sub-bass Extension | - | Within 6 dB of target down to 20 Hz (+2.2 dB at 30 Hz) |
| Drivers | - | 1 x 38mm dynamic |
| Built-in Microphone | - | No |
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