I have a 1990 bmw 525i around 160000 miles on it. I recently decided i wanted to replace the speakers along with the tweeters. The tweeters are the main problem(producing cracking sounds and fading in and out) So i want to install new speakers and tweeters all around. I was wondering if this is a easy task. Or is there any problems i will run into. Also if anyone has suggestions for speakers or tweeters please let me know or suggestions for the installation process or problems.

thank you