Would anyone see a problem with porting a sealed face combo amp? I forgot to check the back, but assuming that's closed, would cutting a hole or slot in the bottom of the face do more harm then good? I have a new Fender Bassman 150 that is ported. It sounds very good, and projects great as well. Very nice for small band practices in a basement instead of the big stack. I'm curious about porting an Ampeg Portbass 2x10. I was checking one out in a store, and it wasn't ported. Just seemed like it should have been. If porting would improve it, maybe I'd swap the Bassman for it. Thank you.