well, i talked to this guy doug at american autosound and security (local shop, great guys, tehy dotn screw you) and he convinced me to go with the alpine type-S 12" single voice coil subs. they RMS at 200, peak at 600. my kappa perfects would have been below RMS (by about 125 watts) so he todl me the S was bettter matched to my amp. the amp is in my sig (the clarus). what do you guys think about the Type-S subs?