i set the sub phase to 0 ran aud. setup then tuned the level in with a SPL meter. in the reciever i set the LPF for LFE to 120Hz and i changed the sub mode to LFE or should that be changed back to LFE + mains because my front speakers are connected to the sub? in your opinions should i bother setting up my old CT 120 velodyne sub? or do you think this will just make it boomy? is there anything else i should set? the new sub is a PB-3000