8-inch door speakers Options

[pepsiman]

I was thinking about putting some 8-inch subs in my doors but i just read that it will rattle the doors real bad...what can i do to prevent this? I have never opened up the guts of my door can u put plenty of sound deading in there? Will that stop the rattles? Also does the subs in the door have to be shallow mount to fit? What is a good 8 inch sub? pionneer has no 8's on their site but primeir does but they are alittle pricey for me i dont need anything crazy just wantin to add some bass but it dont have to be crazy

[pepsiman]

Thanks for all the help could i get a free air sub and put it under the passenger seat that away it wouldnt need a properly sized box to work right...but the door idea still sounds pretty good too. either way i go it seems i would need some free air subs but anyways im just gonna figure on it some thanks again for helpin out