Only thing to stop (or I should say "limit") the bass is more mass. It takes quite a lot in order to keep it from permiating through the house. Mine is more of a light rumble, but I went into the soundproofing pretty heavily (pun intended).

Your room still benefits from reducing outside noise, and imagine what it would be like if you just left it wide open? LOL

Farewell - June 4, 2020