you dont even need that much in the RA unless you want to go down the drain with your speed.... i've had even 2 12" kappa perfects in my car, and damn i swore i lost 5 seconds of time. haha. stick to 1 sub. here are a list of names that are good:

w6v2
w7
Rockford fosgate T1, T2, and T3
Infinity Kappa Perfects VQ


kicker is for power, but quality sucks. so. (=

 

Adire Brahma 12"
1600w of amazing bass.

 

i only have one 12" that i ride around with...i dont wanna lose any power from having 200lbs of subs, underglow, and kits or any of that stuff