If you are using only one sub, and your sub only has one RCA input, then yes. If the sub has a left and right RCA input, then no.
Newbie on subs - need hook up advice
My Rogue 66 preamp has only one set of rca outputs. If I use "Y" connectors to create 2 outputs at each of the left & right channels (one set to go to the amp & the other to go to the sub) do I need to use an additional "Y" to bring the outputs(the ones going to the sub) back to one cable which would then go directly to the sub??? This is difficult to explain and hopefully someone gets the jist of what I am trying to accomplish.