Alright, I have a very cheap Dual DEH-665. It has an aux. input, and I use my laptop to play music, without burning CD's. When I use my laptop, it is noticeably louder. When playing CDs would a line driver help me out with the difference between the laptop's volume and CD's volume. I can get a pretty cheap 8-volt line driver and would rather spend less on it, than buying a new headunit.
