hold up are you saying rd is trash if so say it and don't be incinuating it.
an why would you call it that is what i wanna know, you wanna call the loudest sub in usaci right trash.
an to answer your question yea about 3.5 cubes would put you at about 35 or 34 i think but with about 1200 to 1500 watts continuous power this sub should really wam. good luck bro