I have F12M-150s in ported cabs powered by Matrix GT1000FX. Happy with them for lower volume mancave usage with a low cut and small push at 10k. I have futzed with putting foam / insulation in the the port tube / cab just to see if I could refine / tweak the sound any, but without much overall difference - I've come to the conclusion it's just a fluke luck thing: stuff something in there and it might or might not make a positive change - not a very scientific / measured approach, but easy, so worth a try I guess.