PPI and Audiocontrol kind of stand out from the rest of the pack as far as easy to find consumer products. I would somewhat hesitate to recommend an in dash unit unless it is a 4-5 band parametric EQ. They allow you to customize the freq and the Q (width of the freqs affected). I haven't come across a 7 or 11 band EQ that I have found that is worthwhile for much. An EQ is one of those things that should be set once and left alone. I don't buy into the philosphy that different types of music should have different EQ settings. If you set up your system correctly, the recording (CD) should handle all of the bass boosting, treble cutting, not the listener. Basically, if you adjust it for certain types of music, it's fine if you like your music that way, but if you want an accurate representation of the music on the recording just leave them alone. now after all that babbling, based on the above, I really think that a multi band Audio control (EQL) would be the ideal solution for you. It has somewhere around 18 bands (i'm doing this from memory), it is incredibly reliable, has some pretty good tuning options, and is very cheap on ebay.
does that help?
gotta go to a wild game dinner so i won't be replying for the rest of the day. but i'll check in tomorrow. There are a number of others on the site that can probably do a great job of getting you the info you want.
