With slightly lowered highs, punchy bass and surprisingly great mids, the ZSN Pro is hands down the best headphones on the market under $30. At the moment. As a budget travel option, I love this little fella to death, and as someone who hates BA bass, the low-end hybrid drivers sound spot on. There's a bit of mid-bass leakage, which gives it a warmer lower-midrange sound, but for less than $30 I can't complain. There seems to be slightly better sub-bass extension and a slightly wider soundstage compared to the original ZSN, which is generally good (although these are subtle changes). With all that said, I think it's worth spending just a few bucks more to upgrade to the Tin Audio T2 if you're looking for a relatively neutral audio signature. For the price, however, the ZSN Pro couldn't be any better.
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