I HAVE DENON 4802R RECIEVER WHICH IS 125 EACH 7.1. I AM PLANNING TO PUT JAMO SPEAKERS CENTER 80/160 LONG/SHORT TERM LR EITHER 60/120 OR 90/180 LONG/SHORT TERM CAN THEY GO WITH THIS SYSTEM ALSO RECIEVER IS WITH IMPEDENCE OF 8 OHM CAN I PUT SPEAKERS WITH IMPEDENCE 4 OR 6 OHM NEED...