My subwoofer bit the dust, so I had to purchase a new one. In the meantime, I had a question I'm hoping someone can answer. Pardon my sudden forgetfulness or brain fart, but I was wondering: which would be the better way to connect a new subwoofer--via the single coax LFE cable that I currently use from my 3008 to the sub, or via speaker cables to the black and red connections, which would provide for a high frequency connection. I can't remember the differences between the two. Moreover, I honestly don't recall what high frequency and LFE is on a subwoofer.