Ok thanks, I'd rather not mount separate tweeters, so was hoping the tweeters in the Alpine units might be better (and possibly have better crossovers) than the stock VW / Blaupunkt ones. Is that likely? After this the next mod was going to put some bass/mid 16.5cm units in the doors, and work back from there. I could put co-axials in the doors too, but assumed all the top would be lost in the footwells. hmm.. I'm kind of trying to go the 6x9s under shelf, sub in boot, massive outlay, butchered car. That's what I used to do when I was 18... man... butchered Fiesta's. - those were the days