Got my Mac Mini set up on my Onkyo 505 receiver through HDMI. Have my Cable through component into the same box. It's a 7.1 but I have three speakers and a woofer (Polk PSW505 Powered) attached to the receiver too. Here's my problem: I get subwoofer sound from cable tv and none when I'm listening to music on the computer. I thought it might be where I assigned the hdmi input to, but I moved it from AUX to VCR and still having the problem. Is there something simple I'm missing? There's only one plug in the back of the Onkyo, so I have one half of your typical audio wire going from the receiver to the 'unfiltered' single plug in the back of the woofer. Maybe i need to get a one-to-two wire and send it to the 'filtered' holes in the back of the woofer? Just thinking out loud. Thanks for your help anyone.