nah, they sound all distorted when you do thatthe best way for those kickers to sound is unplugged.
It might all depend what type of amp you have and of course how high you want the speakers to sound. I have a pair of jbl 6 1/2's in by doors with those bass blockers connected to a RF P450.4 and they sound real clean. I'm sure that with that amp I don't need them but still have themnah, they sound all distorted when you do that