Kicker’s Amphitheater is easy to love but tough to rate. Back in 2008, we were genuinely surprised by Kicker’s iK500, a huge, plasticky iPod speaker system that looked like something Darth Vader might have kept in a TIE Fighter to blast out tunes—19.2” wide by 8.5” tall by 8.4” deep, it was imposingly large, built with five speakers, and incredibly powerful sonically, though somewhat cheap-looking. Also known as…