Cardas Neutral would be alright but I believe it starts some what expensive.

I understand now why you couldn't hear a difference with your rig. My comments refer to analog cables where you seem to not have any in the path I haven't done a lot of comparison with digital cables except for HDMI and I certainly don't care to open that can of worms again.

Poultrygeist, try an old set of jumper cables. A set for each speaker. Hack those clamps off the end, just go bare wire. Now that's a connection.