It's finally happening! 2 Full Marty's with 18" LMS Ultra 5400's!
Been sitting on these drivers for a while and its now time to put them to work. Cabinet construction starts first of the week. The plan is to finish them to match my Polk towers (silver baffle/black cabinet). Check back for pictures.
Your setup convinced me to go ported instead of sealed. My room is on a slab and I didn't want to spend a ton of money on amplification to get into the low teens sealed. I'm sure this will be more than enough with also using my other LMS/passive radiator sub as well.