I have asked about using the JBL2226 on the 3Pi awhile ago, and you mentioned that the box size is suitable but the trouble is to rework the cabinet to fit the driver and the port. I wonder if I can cut a big hole (basically remove almost the whole front panel) and replace it with a new one that can fit the 2226 and a new port? Would that work?

I built the 3 pi with the horn placed outside the box so have plenty of space of the mid/woofer.

BTW, have you try out the AE 12" driver?

Thanks.