i had 4 older type R 12's (swr-1241) b4 i switched to JL W3v2's...(sealed) ran by a mmats dhcx2200.1, the sounded pretty good and got loud but i couldnt turn the gain up much more than 1/4 way.. they seemed like they wanted to take the power but one day while showing it off, tore bout 2" of the surround off one sub... sold them the same day!! only lost $30ish from what i payed!! LOL