Have you considered the VTF Hsu sub line instead of the STF. More power, deeper bass $750 shipped for the VTF3 MK2. Heard all the Hsu's at his headquarters in LA. The VTF3 was a monster. . . had to have it. . .love it. Also available in cherry.

Sorry didn't mean to add more options to the list but. . . .

Where are you Axiom owners?