So it's been nearly three years already with the Tuba HT, and I am thinking of moving it and adding SPUDs to use as a second row riser.
I dug up an old SketchUp I had made initially to decide between the two subs, and just added annotation to show you all what I am considering:
So the Tuba HT is currently at the base of the arrow. I am considering moving it into an adjacent closet and have the opening shooting into the HT room. I would lose corner loading, but the current location has never been ideal acoustically anyway. I don't think the sound from the THT will spill into that adjacent room. It it very stiff and does not vibrate. I suppose the wall that the THT will be up against may carry more LFE to the rest of the house. If that happens, I'll just use the THT when it's not a nuisance (and just use the SPUDs).
Then I would build a pair of Spuds (are these still popular three years later?) to use as a second row riser as indicated. I have yet to test out an 11-inch step, which seems high to me.
Any thoughts? I recall people saying not to mix the SPUD and THT together.