When it comes to bass performance. The bass performance for the Hifiman Sundara is pretty much neutral and linear. It does not come with that dominating sound on the bass hence may make the music seem flat and boring than it actually is. Though not as dominating as you would want it to be. It still is not soft or flabby.
The bass is just enough to make enjoyable music without muddling the midrange and treble. Besides that, because of the controlled bass response. You’ll be glad to know that the lower mids are pretty much accurate and detailed. The vocals are also quite clear, crisp and accurate giving you a great music experience still. The treble is energetic and elevated without being overly peaky.
He400I generally sounds great. Which we can prove by the fact that it is rather quite popular in the market. The bass is well-extended, and it is tight and punchy. Unlike the prior set you can actually feel the bass well enough to enjoy the song at its full potential without having to face any disappointment whatsoever.
The midrange is somewhat warm and really enjoyable. It comes with a treble that is impressively clear, evident, and lively. Sadly when compared to the Hifiman Sundara it tends to be a tad bit muffled especially in the midrange and it is also a bit more sibilant in the treble.