Well I've been crunching some numbers, and I'm considering changing my setup.
unforchantly, while testing (no vid, shame), I didnt have a subsonic filter active, and a song surprized me with a 10 or 15hz tone and the the sub hit the back plate...it appears to be loose now (the piece that the coil is wrapped around) and needs to be glued (seems like it is hitting/vibrting against the dustcap) or reconed as it likes to blow fuses on my amp, but the coils are intact, and the wires are not shorted out.
other than that it hit/peaked pretty **** hard at around 35hz before it hit that low note.
What I was thinking is two sundowns 1500 strapped, or the saz 3000d, 1-2 more d31a's, 60 feet of 0 gauge, 3 more fuse blocks, a LMS-5400, sealed 7.5 cubes.
I'd be selling the Ava, and the pdx1.100...and I'd be running around 3200 watts instead of ~850-1000 on the sub~