i have a Pioneer Sc1224 rated for 4-16 ohms, pair of 6 ohm Jenson X7s and a 4ohm 320W Panasonic SB-W940 subwoofer. The Sub only has bare speaker wires and the pioneer has preamp coaxial outs. I'm wondering if i could connect my sub to one of the front terminals along with my Jensons ?