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 ?
You cannot connect the sub passively along with the Jensen speakers because the combined impedance will be to low. Since your receiver has a line level sub out you will need an amp to drive the sub. Probably better to just get a self powered sub.