First off.... I just went through a "hands on" kind of personal testing of many of these. I have a 12" JL Audio w3v2 runnin off an Alpine mrp-m850 and a pair of 4" x 6" Boston Acousics S70 dash speakers and a set of 6.5 w/ 1" dome Kenwood KFC-P708 components runnin off an Autotek 490.4 with a...