I could have gone completely rediculous, and walled my truck... I was set for doing that... but then I was REALLY disappointed in how the 18" destroyer sound in a very large box in my truck (like a wall almost)...
It didn't pressurize my truck at all, like my single 15 did. Inside the truck the 15 was much louder to the ear... than the 18. When I opened both doors or one door... the 18 was insane... the sound carried hardcore.
So, I was going to do 6 12's... but to get anywhere near the proper size box... I'd need a wall.
So, 6 10's in a more nearly proper sized box... in the hopes to still do the pressurize thing in my truck. I like the sound IN my truck... and to pressurize me and my passengers... FTW.
w00t.
nG