Hello. I have an OLD SCHOOL set of Hifonics Zeus 15in subs. They are series one. I don't know what the power handling is on them, but right now they are getting about 500wrms a piece. They are single voice coil 4ohm as far as I can tell. They are in a ported box that is covered. Im not sure about the cu ft of the box but i believe each speaker has about 1.5cu ft of room. Make an offer!