Hi I'm new to all of this and I need help. I've got a 1992 mini mayfair, with a pioneer DH-1500UB with two speakers in the parcel shelf. I want to put a sub in the boot(bearing in mind a mini boot is tiny!). I don't want the sound to be compromised because of the size I am restricted to. I would like one that sounds good with rock and heavy metal music and the stereotypical music you hear on subs- rap, pop, dubstep and modstep. I don't particularly want to spend more than £100. Do I have to have an amp to get the big bass sound I want? Any help would be appreciated, thanks