Nice review! At first I thought it was going to be some guys impressions of his first serious sub, but opening the link, your review is very measurement heavy, going so far as measuring Bl(x) and Km(x) graphs on the driver. Very cool! I think one of the advantages of the servo system is that it can help compensate for some of the non-linear travel there. I'd love to see some groundplane measurments of this bad buy, like CEA-2010, but I know that is tough to do.