Well, the speakers arrived and I tested them out and they sounded fantastic at low volume but when I turned them up they started distorting really badly. I noticed one speaker had a tear in the cone but both were having issues. I'm thinking the box got dropped and the voice coils got misaligned and were rubbing. They were packed standing on the sides instead of magnet down which seems like it might make them more vulnerable to damage from a drop. FEDEX has paid the shipping insurance so no harm done. But when the check is finally deposited I'm gonna order a new set.
The differences might be in the open back I cut out of that cab. The one I'm using now has a ported, closed back with a lot of batting inside. The other one I cut the backs out and removed all the batting. Much brighter and bell-like than the Commonwealth speakers in the closed back cab. I may cut the back out of that one too. I'll post clips when I finally get them new speakers in.