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Denon AH-MM400 (2016) vs Sony WH-H900N h.ear on 2 (2017)
Sony WH-H900N h.ear on 2 (2017)
The Sony WH-H900N h.ear on 2 (2017) and Denon AH-MM400 (2016) make for good, if unremarkable, Closed-Back Headphones at their respective budgets.
With that said, while they both should serve reasonably well, you might want to look into other options at the $140 and $320 price points - it's likely that there are some better alternatives available.
If you want to learn more about the Sony WH-H900N h.ear on 2 (2017) and the Denon AH-MM400 (2016), however, we prepared a summary of the information that we have:
The Sony WH-H900N h.ear on 2 (2017) managed to earn a spot in roundups from two sources that are known for their trustworthy review methodology - Rtings and Wirecutter (NYTimes) - but fell short of making it to the top of their lists.
Returning to the Denon AH-MM400 (2016), Wirecutter (NYTimes), a source that's known for its high-quality in-depth testing, has great things to say about it. In fact, it was named its "Top Pick" in its "The Best Everyday Audiophile Headphones" roundup, which is quite a feat.
We couldn't find any sources that tested both of these Closed-Back Headphones, so we only analyzed how they performed in reviews from different sites.
We first examined which sources rated each of these best and found that the Sony WH-H900N h.ear on 2 (2017) got its highest, 7.1, rating from Rtings, while the Denon AH-MM400 (2016) earned its best, 9.7, score from Head-fi.
Lastly, in order to better compare them to the rest of their competition, we averaged out their review scores. The Denon AH-MM400 (2016) managed to get 8.7 out of 10 - considerably better than the 7.4 review average of Closed-Back Headphones in general - whereas the Sony WH-H900N h.ear on 2 (2017) earned 7.0 points.
It should be said that doing a direct Sony WH-H900N h.ear on 2 (2017) vs. Denon AH-MM400 (2016) comparison might not be entirely fair due to the difference in their prices - some sources don't put much weight on value for money and thus tend to give better review scores to more expensive products.