As far as upgrading to the 10", right now I have my 8" in a ~0.34cuft (accounting for speaker displacement) truck-style box. If I make a big cut-out in the front of the box and add another MDF board I can mount the 10" out a little further and it will be in a volume of ~0.37cuft. The IDQs recommend 0.3-0.6 for volume with recommended RMS at 250W. As I understand it the smaller the box the more power handling they have.........so will I get sufficient output in 0.37cuft at 225W? I'd hate to build a whole new box.
Where can I get hard rubber baffles for my Kappas? And how do you run the wires? I'm using foam baffles now and they compress to allow the wires to pass by. I had to cut out the bottom of my foam baffles though because they vibrated and played their own little tune. I'd need dimensions because my windows pass behind the speaker when down too.