After much work hooking up my new Parasound Halo A 23 amp, I discovered a horrible hum coming from the speakers. I pulled the Radio Shack ground loop isolator from my computer set-up and placed it between the amp and receiver. Voila! No more hum. It seems to be working fine, but I was wondering if there was a better one? The Radio Shack one seems so cheap. I'm not in the "must have expensive cables" camp, but the quality seems so cheezy. Any better ones out there? Or does it not make a difference? Any that I don't have to RCA barrel adapters on? Much thanks for any help!