whats the difference between a 12inch sub and a 10inch sub.
Two.
whats the difference between a 12inch sub and a 10inch sub.
Buy one of these 10's and be happy that it sounds considerably better than the Kickers that your friends have... http://www.imagedynamicsstore.com/idstore/image-dynamics-id10d4-dual-subwoofer-p-145.html
you could always check out kickers square 10's too as another option.
http://www.kicker.com/Solo-Baric_L7
I have one L7 12 in the cab of my sonoma and it's more than enough. I had two standard 10's prior to that and they were plenty too. I guess it's all relative. Are you going for quantity (everyone and their mother can hear/feel you coming), or quality (sounds well tuned in the immediate listening area)? IMO the latter is the better option. by. I laugh when cars rattle
Another thing that most people overlook is the box. That's just as important as the sub you choose. Pay attention to cubic feet requirements or else you'll be starving your sub from the required air space it needs to perform. There's no point in having a top of the line sub if you accompany it with cheap or inadequate counterparts.
Good luck with your decision, and don't be hasty just because of the excitement.
no it isnt ok to have both they will cancel each other out. either get a 10 or a 12 you will be happy with either! and you can make either sound the way you want it by the enclosure you house it in and by tuning!