Current System setup:
Tru SSLD66 line driver
MB Quart DSC4125 running the front stage passive
Dynaudio System 360 with DLS UR2.5's in for the midrange temporarily and these tweeters in temporarily
MB Quart Nau660 running rear doors and rear deck
This tweeter is quite impressive at it's price point!! Let me just start off with this though, I noticed an immediate rise in my noise floor after installing these, I assume because the DCR is only 2.9 ohms and the inherent sensitivity of tweeters in general that caused this to occur. I don't really care too much about the noise floor so not an issue for me.
Overall an extremely detailed tweeter with excellent on-axis performance. In my kick panels pointed slightly on axis they sound pretty darn good, they are what I would call airy, but on certain notes have a boxed in sound. I feel as though they could do with a bit of t/a and some eq'ing what other tweeters that cost quite a bit more can't even do. I do believe these tweeters are best suited for on-axis mounting to avoid the boxed in sound, I can't confirm that this would be the case as I only have them in the current configuration in my car. I do get some break up when I get on them hard but they mostly handle power very well.
Overall, I would not hesitate for ~$30 to purchase these and run them in the car.
Sound Quality: 8/10
Power Handling: 8/10
Build Quality: 9/10