This little TC Sounds baby sub is very very impressive ! Compared with Fathom f112,f113,Klipsch RSW15 and the large dual TC-3000 sub.
Detail,extension,,impact and clean output it does it all very well, for two low cost TC-1000 12" woofers...I am very impressed.
I can get massive output in the tiny room and solid output in the large room. Clean and defined are the best ways to describe this new sub.
Two of these in a large room and you have an inexpensive solution to anihalate anything commercial costing two to three times as much in overall quality(providing you have proper tooling and good building skill).
Also think about building a box for eight TC-1000 12" SVC woofers.