I have a 1x12 closed back cab with a v-30 that gets muddy in the bass at high volume and just sounds wrong. This didn't happen with the same speaker in an open back combo. My therory is at high volume with max speaker cone movement it creates pressure variances in the cab, thus interfering with speaker cone's natural movement. So I'm considering drilling maybe a 1" hole or so in the front baffle. Anyone have any thoughts on this?