I am using Signal Cable for my REL. They made up a Speakon cable which is much better than the stock cable and was cheaper. This is a high level cable but their line level cables look good also.
subwoofer cable recommendations.
About five months ago i purchased a Hammer Lite subwoofer directly from GMA, and since have tried several cables including Monster cable, Cardas Quadlink, and Audio Magic Excalibur ll without success, either too lean or to booming of a sound, I have read about a couple cables that might be right for my system, one is synergistic research the other Audioquest SUB 3, if you can think of others i would appreciate it .