I am looking at rearranging my room in a way that would demand much longer runs than I had in the past. Specifically I would need to run two pairs at 27 feet each. Unfortunately, running XLR cables from the crossover to amps closer to the speakers is not an option. I am going to be running one pair from an amplifier to my tower speakers and another from a different amplifier to my subs. I'm going to probably look for used cables and could be open to DIY. My guess is getting any high end cable at this length new will be prohibitively expensive. All recommendations welcomed.