I went to a local car audio shop here in Calgary and they had some very high quality stuff there.
I was trying out their Audison vRX amp along with their Focal 11" subwoofers and the 15" (I believe it was) and lemme say that these babies pound hard!
I can't remember the name of the tweeters, but they gave good and crisp guitar noise, and for those who love speakers you know its hard to find speakers that plays clean and crisp strings.
He had the Alpine CDA-7998 playing the CD at about 30 volume, and on some subs they would start giving off funky sounds. The Focal 11" were giving off clean and crisp sound all the way through the song. The 15" gave a nice low bass which is very mellow, not hard like the 11"
Audison vRX, never heard of them until today and I could tell that this thing must give off awesome power in order to power these subs. (btw, he had 4 11" pounding, 1 15")
I think I'm gonna hook these babies up for my ride when I finish with the body work guys, I think these are a good investment. If you have some time, goto an audio shop near you that carry these products and hear them for yourselves, it's astonishing!