AMR150 hum

gwilki
gwilki Posts: 1
edited February 2011 in Vintage Speakers
This is my first post, so be gentle. :-)

I have the AMR150 set on my pc. When I bought it, the rear speakers had a loud hum. I contacted Polk back then, and they said to send them to them. I'm in Canada. Sending them was going to cost almost what they were worth. I disconnected the rears and did without. Now, I'm trying again. (I must be a ****.) Different PC, same issue. I wrote to Polk and they replied saying that I should " wire the two pair of speakers in series, not in parallel. The Impedance load will be too low for a paralleled connection".
I know the difference between parallel and series, but I'm not sure what Polk is getting at.
I would be grateful for any advice.
Right now, the front and rear cables are plugged into the analog front and rear jacks on the sound card. I have no digital out jacks. The speakers are then running from wire jacks on the sub-woofer.
The sound card has outputs for front, rear, center/sub and side. I'm not using the latter two jacks right now.
Thanks for any help.

Grant
Ottawa ON