Hello, since you have powered Bass , it is not that difficult ,or expensive to incorporate
Just look at SVS 3000 subs 50 bit processing, and full adjustment for the bass and room
From your phone or tablet .in this day and age it makes perfect sense.
Who wants to keep getting up to adjust ,and different songs different output .
that is why a working App makes total sence ,, check out the SVS subwoofer app
As a good reference .p.s SVS said it cost them under $100 for parts to incorporate.