I strongly believe the box is perfectly fine. I got the best glue lowes had, titebond 3 wood glue. I spent excess glue on every peice, i mean u can see it on the outside of the box all over the place, even after wiping it. its in a crew cab truck. Its wired for 2 ohms, the AQ1200D is rated at 870watts rms @2ohms. i had the gains at 3/4 using the gain knob with the amp, it has a clipping light. I used the same method setting previous subs with no problem. I strongly think its the sub itself. Not because im afraid to admit i did something wrong, but because i got it used. I have no idea how it was treated, how it is originally supposed to sound, etc. If the sub is fine, then the sub is just not got the Sound quality i am expecting it to have. I need to move on to a FI Q. ill try and get a video posted Wed. morning as i have to work again tonight. thanks for all the fast replies, hope we can figure this out. I dont want to pass on bad judgment of FI, or the SSD lineup because of a crappy install or a bad used sub.