I recently bought the Onkyo TX-8270 to pair with my Klipsch R15-PM's. After hooking up the speakers to the receiver, only the left channel plays the audio. I've troubleshooted using different sources and speaker wire,switching the speaker from left to right on the receiver, nothing. The right channel is the only active speaker so the passiveness of the left and the fact that it works leads me to believe that it has something to do with the right being powered. I tried connecting an RCA to my receiver's Pre Out but that didn't do anything. How would I go about giving sound to the right channel?