I live on a farm in the southern part of Norway, that means the I have a lot of space for my home theatre, I built myself a small HT in the garden, with no neighbours to close. For the moment I have Klipsch speakers all around, with a Maelstrom 21" in a sealed enclosure (used to have 2), to single Tuba 18's and 1 double Tuba18.
I am amazed, with a placement on the wall of my HT, I measured 126dB at the mouth of the double loaded one.
It even plays louder than my maelstrom 21".

I have just ordered the Dayton 15" for my next project. The Tuba HT.

When I get started I will post some pictures og the progress.