I was in a similar situation requiring long speaker cables - give grannyring at this site a shout - he can fab some excellent 10ga cables for you with excellent performance............I am very happy with their performance
Need 20 - 25 foot spk cables.
Having to move a pair of Sound Lab M2's to a new position in the home. Problem is that the equi rack has to stay where it is. So I will need 20 - 25 foot cables. Real high end will be above my pay grade. I had used in the past real honest to goodness, belden coax in 10 foot runs. Roger Sanders had used this years ago with his speakers and ESL amp. I have a ESL amp and to be honest for many years the coax sounded pretty good, but I'm sure I could do better for a long run. Any comments appriciated.