Sundown says to put the sd-2 ten in .5 cubic foot with 1 cubic each you can port them and hit louder
I have mine in .53ft each sealed and with volume maxed out they hit everything nice. At lower volume they kinda high bass me to death
Maybe I haven't broke em in yet. But still it's a nice sounding sub you should be happy
Dvc 4ohm and the 1200 should work great
They will take a bigger amp I have mine on a saz 1500 with no bass boost and gain set right
Subs act like they r getting all the power they want with no problems.
So far this is the best sub that I could fit in my truck behind rear seat that I found