Review on Powerful JBL CS763 CS-Series 6.5In Coaxial Car Audio Loudspeaker - 135 Watts Peak by Mike Betzing

I bought 2 pairs of these speakers to replace worn speakers in my 2005 Volvo S40. It was a bit of a hassle to install due to the weird existing brackets in the Volvo, but I found a YouTube video that does a good job of showing how to do it. The sound immediately improved a lot and they got better after I played them in (I listened to classical music quite loud for several hours. Classical music is best for speaker grinding because of the wide frequency range, including deep bass).