For a subwoofer I would suggest spending alot less than six hundred dollars. It is only going to be for something that replicates probably 60hz and below. Bass is omni directional. If it was me I would maybe use power chords that you replaced when you maybe upgraded. I just replaced my cardas hex chords with the their golden reference chords and would have no problem slapping one of the hex chords on a subwoofer because it has the simalar signature sound quality and it's just dealing with bass not the mid or highs. It would mesh very well the other power chords.
Subwoofer Power Cord Suggestions
I'm looking to spend up to $600 used for a new power cord for my Rel subwoofer. I'm looking for suggestions on where to start. Please let me know what PC are you using and why do you like it on your sub? I like bass that is well defined with plenty of texture. Much Appreciated!