I bought my truck used and the guy before me had a new head unit installed with a single disk cd changer, but he left the speakers alone as far as i know. Now when i turn the volume up past 12 the speakers just have the crackeling noise. I want some new speakers and what ever else i gotta get with it to make it sound decent. I don't want one of the obsessevly loud systems just something that makes the music sound good. Can yall please tell me what you recomend ---with what i described. Thanks!