Well as far as subs go I found these cvr's http://www.sonicelectronix.com/item_9348_2-Pack-of-Kicker-CVR122-07CVR122-CVR12-Dual-2-ohm.html and http://www.sonicelectronix.com/item_9347_2-Pack-of-Kicker-CVR124-07CVR124-CVR12-Dual-4-ohm.html
Except the 1st one says its dual 2 ohm and the second is dual 4 ohm. Idk which is better. So Im guessing 2 12'' Cvr's would be louder then 2 15'' comps?