my m8s just got a mk2 gti 16v and hes running a sony cd head unit, orignal speakers sounded pants, so hes replaced them with jbl component speakers (orignal fittment jobbies), and the improvement is great, would advise them to any one who dosnt want an amp or any of that stuff, its alot clearer and deeper bass compared with standard jobbies, give it a go they didnt cost him that much, will find out exactly how much they cost him and let ya know