? http://mobile.jlaudio.com/products_subs_pages.php?page_id=42 Dynamic Motor Analysis is a real thing. Not only do they FEA their drivers and simulate BL(x), Cms(x), and Le(x) curves, but they also have a Klippel on hand that can physically measure (more or less) the same thing. Much more than just your static small signal thiele/small parameter analysis (Dynamic vs. Static). Honestly, if it's from JL Audio, you can almost always bet real, viable, and impressive engineering is behind it. A lot of manufacturers do that however. Very true, although not always in house. It's amazing how many companies use FEA....even on at, say, Boeing, FEA is used very extensively in the design of the entire airplane. Pretty much all real companies use FEA, but real speaker designers go one step further and use a laser vibrometer to fix the errors in their FEA. JL isn't that far along , but there are a lot that are in particular in Europe. Here in the states it is fewer, but I know of four manufacturers that have made the investment. You name a company that builds something at all technology based and I will guarantee they have FEA capability. Hmm, I wonder where they could get one of those laser vibrometers....