I feel I know quiet a bit I've been doing it for a while now but I don't keep up like I you guys do. Also, finding a Forum has made me ask all kinds of questions cause I feel I may need confirmation since I learned most of my stuff on my own. You guys are helpful and know alot - glad to be here.Like I said before. EQs are a very useful tool if you know how to use them. Most don't know how to use them, these cheap dash units are pointless. People that buy them just turn the knobs all the way up. You seem to know a lot for somebody that ask so many questions about the most basic aspects.