i have 2 r.f hx's. i have a sealed box right now. i am feeding them 600 watts from a mtx amp. i was woundering if i add a 3rd hx2 12" if it would be louder and still kick. i dont like the bandpass boxes. another Q? witch would be louder? 3 12"r.f. hx2's or 2 ported.