Best car speakers Ive ever had - and Ive tried Alpine, Kenwood, Pioneer. Decided to give these a go after having Infinity home speakers and being totally satisfied with them. Also, had Infinity references in my previous vehicle with no issues. But the difference between Kappas and Reference series is noticeable. These have amazing clarity and sound with neglible distortion (but think its my 4 year old Alpine head unit causing it). Like these even better than the 63.9is I have in the rear. You can't go wrong with these babys.