It’s usable but if you have another cable laying around it may make sense to you to swap this one out.

For me I do enjoy a bit more of a neutral leaning source with good energy and dynamics to drive the KB01.The upper midrange sounds decent here actually without that overcompensating “detail boost” that many offerings turn to (not saying that it doesn’t have, but not too much). This set has 10mm dynamic drivers with a combination type of thermoplastic (polyetheretherketone) and a composite polymer (polyurethane) diaphragm which give a more rigid yet flexible and a good resistance and tolerance to chemical effects and high heat temperature. With that said, resolution is pretty nice, driver speed isn’t horrible either which does present a decently resolute replay within a warmer canvas.

By the way, why in the world is KBear NOT INCLUDING the KBear 07 tips inside of every single earphone? It's definitely not everyday I can still say a random pair of IEMs that comes to me can perform with no flaws, because I seriously can't think of any for this. Remembering that these retail for less than 20 USD, we do have to temper our expectations accordingly.

However, the tonality of the M6 Ultra is a bit more velvet in sound which made the note weight a hint lusher and weighted.