I had a Nissan Xterra before I got my Accord and I had 2 Kicker L7 15's in it with 2 Kicker KX850.2s. Last night I put one of the 15s in my Honda and good lordy that's some rattle. I know I need some sound deadening but I still believe it would rattle if I added the other 15 and the other amp. Anybody ever have 2 15's or anything larger in your car and how'd you keep the back deck from rattling away? My brake light up there hits the back window I'm also worried that if I add the other one I'll have way too much weight so I'm just wondering if anyone ever had anything like that in their car and if so, what they did to help out on the vibration and how it affected the car with the added weight.

 

Well if you add subs to any car rattle is going to come into play. Your going to have to deaden everything that you can think of. And make sure you tighten every nut and bolt. Sometimes you can't do anything about it. As far as weight. Anytime you add weight to a car you will change how the car handels and effect mpg.