What size mesa 4x12 cab for g12H-75?

[Klauth]

How about the halfback with the top section closed?

I just got a back panel for the top section of my split back from boogie.

 

[JDs Couch]

I just got a back panel for the top section of my split back from boogie.

Sweet. I've had the back panel since I got the cab used in about 99. I go back and forth depending on the use case. But, for live metal, no doubt fully closed is the way.