quick update, box is in and fricken huge lol
best part is its stupid loud, id say its easily 2x as loud as my last set up. however i definitely have big issues with flex now, i watched my taramps hd3k moving about a quarter to a half an inch and its mounted on the back wall with only partial power with a sheet of plywood. probably will get a 3/4 or 1 inch thick piece of MDF and slather it with a ton of glue and see if it helps at all.
i clamped about 45-50vac and 18-20 amps so my rise is a little less but im obviously letting the power stay low until the sub breaks in