I was in the market to get a subwoofer cable and thought I would try one by Belkin- Pure A/V line. It was $ cheaper then the Monster it sat next too and purchased it. What a mistake. Now I know...I could have just been the bad luck- but I hooked it up to my sub and it hummed like an S.O.B. Thought maybe I hooked it up wrong (arrows) so tried other way- no change. Well...its a sub that I had been for years running with the speaker inputs...so thought maybe something had happend to my lfe input. Pulled out my other sub- same thing! Not happy. Raided my other systems sub cable (monster 300series sub cable)...and ya know what! NO HUM:> took the bad boy back along with the other 2 packages of un-opened Pure A/V componant cables... I'm glade the Pure AV PF40 works like a charm.