What is it that worried you about the sk3500.1??? I own two of the 1st gens and have them strapped but I clamped almost 3k rms clean on one of them at 2.3ohm 13.8v with a 38hz test tone and my subs were wired to 2ohm and I now have them both strapped at 1ohm each for a 2ohm final on a set of sundown x15d2's and I'm over 50 daily on music...