Simple PSW10 Wiring Question

I'm awaiting my Onkyo SR607 and Polk PSW10 sub to come in the mail but first had some quick questions.

The SR607 receiver has L and R outputs for the subwoofer (picture here: http://www.cepro.com/images/uploads/large_tx_sr607.jpg) and the PSW10 has L and R inputs as well.

Since the sub is mono, would it benefit me to hook up both L and R channels? The subwoofer will be less than 10' away from the receiver...will I need a special shielded/premium/etc cable or will basic < $5 RCA cables work fine?

Thanks.

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