I have a sealed 1x15 cab. I'm thinking of doing 2 things to it: Replace the driver with a better one. Replace the front baffle with a ported one. But, not necessarily at the same time. Ideally, I would replace the driver first, then do the porting later - if I still want to, after upgrading the driver. The question is, does it matter whether the cab is sealed or ported when selecting a replacement driver? I want to avoid upgrading the driver while the cab is still sealed, and then porting the cab and needing to replace the driver with a different one. If you want specifics, the cab is an Ampeg B-15R combo and the driver is 8 ohms. I'm looking at upgrading to a better 8 ohm driver, and also changing the front baffle to a ported double baffle design like the mid-60s B-15N had.