I believe your setup is not sensitive enough to use better quality cable. From all the systems we used with SR active cables we had found that it sounded quieter with shielding on than without ( high freq is softer )
You need to upgrade your amp/preamp to audio only type and not home theater combo. The difference can be night and day.
You need to upgrade your amp/preamp to audio only type and not home theater combo. The difference can be night and day.