this is 8" 600wt sub.. Enclosure is 7.2 x 14.4 x 12 inches. I haven't measured but I think it may fit. 600wt is not much but since I am planning to pair it up with speakers which are rated down to 30Hz, it may be enough? will see.
My amps are less than 3" tall and have less than 2" clearance between the top of them and bottom of seat.
Went and checked again there's more room than I thought but a smidge over 7" I don't think so. If you can easily return the box I say try it. If not then I wouldn't risk it. There may be a company that makes a stealth box for it.
TS-SW2002D2 is rated at 20-200, and TS-A16xx are 34-30k Hz. I am thinking about blending them at about 50-70Hz. I need linear response for the type of music I am listening to, so don't really need overemphasized lows. In home theater Audyssey set up X-overs at 55-70-95Hz but turned surround down to 85 as it was getting too directional and was creating strange surround effects.