I just got a tc sounds 3000. Ive built many boxes before but never with a passive radiator. Im wanting to make a box for the sub using passive radiators to get the most out of my power. I really want it so get loud with out falling off hard on the low end around 25 hz any box ideas or previous expirience with this sub and passive radiator would be great i need help box dimmension port area sq feet ect please help me thanks!