Sub woofer pre out to line in (l/r)

JohnnyB
JohnnyB Posts: 5
My receiver has a sub woofer per out that specifies the use of a monural audio cabel. My sub woofer (Polk Audio RM6800 speaker system) has line inputs for left and right. How do I make this connection? Is there a cabel that cna accomodate this?

Thank you.

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