I am not sure I understand. If I do, then this is the answer.
Subwoofers are powered… so you run a line from the preamp to the subwoofer. You do not want to connect speaker wires to the subwoofer.
If you do not have enough preamp outputs you can use a splitter at the preamp.
Subwoofers are powered… so you run a line from the preamp to the subwoofer. You do not want to connect speaker wires to the subwoofer.
If you do not have enough preamp outputs you can use a splitter at the preamp.