For home theater, get as many and as big and powerful of subs as you can afford and have room for, assuming you're not living in an apartment. As far as how deep they'll go, look at the specs. I love and own Rythmik subs, but for sheer output, I'd take a look at power sound audio also. You'll get better information on a home theater forum than you will here.
2x2x12inch or 2x15inch subwoofers
I am deciding between either a Rythmik G22, E22, or E15HP2.
I will buy 2 of each. Would 2 12inch drivers deliver more room pressureization or 1 15inch driver? Salk recommends 1 15 inch over 2 12inch woofers. I have 2 REL S510s in the front of the room connected by both High Level and .1 and the speakers higher up would be in the back of the room.
Room is 2200 cubic feet, and has full accoustic treatments.
I will buy 2 of each. Would 2 12inch drivers deliver more room pressureization or 1 15inch driver? Salk recommends 1 15 inch over 2 12inch woofers. I have 2 REL S510s in the front of the room connected by both High Level and .1 and the speakers higher up would be in the back of the room.
Room is 2200 cubic feet, and has full accoustic treatments.