Took the plunge today, wiredvthe top two drivers with the tweeter and sealed up the ports that connect the top half of the cab to the bottom and wired the bottom 2 (with the huge port) to a separate output jack. Planning to use the Ampeg pre with one channel of my PA amp to the ‘low’ 2x10” and my B3n through the second channel into the ‘high’ 2x10”
Added bonus is that the cab isn’t as boomy as before, so a more controlled low end.
Win/win.