Hi all, I am wondering for you sound-techies out there... when a cab is rated at a certain wattage (for example 75) if you take the speaker out and replace it with a different one (say 150) assuming that the ohmage is the same is the actual box going to matter as well? Is the box rated at 75w also? I understand that volume (not loudness but a measurement of space) has something to do with it. So if you have a cab with 3 cubic feet of space inside and it houses a single 15" speaker rated at 75w. You replace that speaker with a single 15" speaker rated at 150w. That cab can still handle it? Or does it now need 4 cubic feet of space inside or whatever. Thanks!