Im glad to see that there are still people showing love to MTX. THey are not that bad of a company just a little pricy nowadays compared to their competition. For mainstream subs tho the 75,85 and 95's they make pound nicely. That shit is slappin tho for a sealed box i have to give him credit.
Go to audioenhancers.com they build prefab slot ports specifically for MTX woofers and several other brands as well.
I had my MTX 9515 in an AudioEnhancers Slot port and i was doing a 144 all day off 1500 watts in a 96 Accord