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Final Audio Design E4000 vs KZ ZS3
The Final Audio Design E4000 makes for a good, if unremarkable, Earphone for people with a $110 budget.
The KZ ZS3, however, is merely mediocre at its $13 asking price, when compared to similarly priced products, and won't satisfy the needs of most people.
In either case, we suggest that you first take a look at some other options at the $110 and $11 price points before committing to one of these - it's likely that you'll be able to find some better alternatives.
If you're still interested in learning more about the Final Audio Design E4000 and KZ ZS3, however, we wrote a summary of what we could find about them:
The Final Audio Design E4000 was loved by reviewers at Wirecutter (NYTimes), a highly trusted source that performs reliable in-depth testing. It did great in its "The Best Earbuds" roundup where it was named its "Top Pick", which, in itself, makes it a product worth considering.
As for the KZ ZS3 - Head-fi, a source that conducts reliable hands-on testing, has featured it in its KZ-ZS3 Hifi High-End 3.5mm In-Ear Earphone Headphones Earpiece Original Headset Bass Earbuds With Microphone review roundup. However, it didn't make it to any of the top spots.
When we thoroughly analyzed their review scores, we learned that all of the sources that tested both Earphones, including Head-fi, preferred the Final Audio Design E4000 over the KZ ZS3.
We also took a look at which sources they managed to impress the most. The Final Audio Design E4000 was liked best by Head-fi, which gave it a score of 9.1, while the KZ ZS3 got its highest, 9, score from Head-fi.
Lastly, we averaged out all of the reviews scores that we could find on these two products and compared them to other Earphones on the market. We learned that both of them performed far better than most of their competitors - the overall review average earned by Earphones being 7.3 out of 10, whereas the Final Audio Design E4000 and KZ ZS3 managed averages of 8.6 and 9.0 points, respectively.
Due to the difference in their prices, however, it's important to keep in mind that a direct Final Audio Design E4000 vs. KZ ZS3 comparison might not be entirely fair - some sources don't take value for money into account when assigning their scores and therefore have a tendency to rate more premium products better.