K's Earphone K300

Got this sample for a review, although I was very skeptical about the point of getting cheap high-impedance (Ω300) earbuds, for which you'll have to buy a dedicated amplifier that costs about 3 times more than the earbuds.

Truth be told, I was not impressed. Generally, the sub-bass isn't that great and the sound is muddy - the mid-bass is bloated while the mids and highs are quiet and distant and tonally dark. Some delicate detail can be noticed but it's very distant.

These earbuds aren't bad, I just can't see their purpose, thus cannot truly recommend them, especially for their price.

I find most earbuds quite uncomfortable, and they tend to put pressure on my ears after a while. These earbuds' housings are very generic and used for many other earbuds, so there isn't anything special about the lack of ergonomics with these earbuds.

A very stable bass response, no distortions. The sub-bass isn't quite there, unless you manage to position them very tightly somehow, but the mid-bass and the upper-bass/lower-mids are highly emphasized, to the point of making the sound rather muddy.

A significant dip in the mids and upper-mids make the sound distant and you'll get the feeling that the earphones aren't placed properly inside your ears, and you'll try to push them deeper, but then the bass and the lower-mids will be too bloated to actually enjoy the sound. Simply put, the mids are quiet, very muffled, dark and somewhat discolored. Moreover, complex music genres, like harsh EBM and heavy metal sound like a real mess. Better than many earbuds, but nowhere near what cheap in-ears can achieve.

Same as the mids, the treble is distant and muffled. Specific frequencies make it above the rest which makes them sudden and unbalanced. There's nothing that can save these earbugs from their extremely dark and quiet mids and highs.