Basically what the title says. All subs will be in the same box just making sure it wont be a problem because the heatsink is the only thing that has really changed I thought. One amp on each sub.
dude, your talking 5% better cooling, if that calss D is heating up there is something wrong. run that bish to the limit without worries. The new heat sink this and that is just more insurance for the manufacturer. Youll have no problems, those things are bullet proof.