Where to begin... This is definitely one of the poorer performing component sets that I have ever owned. The tweeters are extremely bright sounding, almost to the point of having a "piercing" sound to them. Not to mention the size is a bit awkward. As well, the connection points for the tweets are very difficult to use since it requires a nearly microscopic sized alan wrench. This makes it very difficult to establish a secure connection when using anything larger than 18 gauge wire, when can be a problem when trying to maintain a fluid wiring look for your install.
Onto the mids. On two separate occasions I had one of my midrange driver fail. The spider separated completely from the base of the speaker. This was not done from overpowering, or excessive heat, but the glue joints just undid themselves; in the springtime no less. Additionally, the mounting brackets that come with this set, did not fit either of my two vehicles, therefore I had to resort to making custom MDF spacers in order to make a secure mount. Really the only positive to this set is the fact that they come in a two ohm configuration. Aside from that, I can't think of anything positive to write about. I most certainly would not get another set, or recommend them. I understand that this is an entry-line offering from Infinity, yet other companies offer entry-level components at the same price point that are made of a much better quality and much more user friendly.

I've owned several different models in the kappa line over the years and these are the least satisfying tweeters. They have a really harsh sound to them with no clarity. I would not recommend at all for sound quality. Good midrange sound and durable components that play very loud. They also have a very large tweeter which is difficult to mount due to depth and diameter otherwise I would give design and features a five star.