Something that has been requested is for a vid showcasing the frequency response of one of the setups... they are proven to get LOUD, but what about the frequency response, your typically peaky/loud setup? Well, here is a vid showing the frequency response of an alpine type R 10" woofer in a 2007 toyota yaris LB in a typical TCAB Classic design enclosure. Power is from a cadence z8000 amp - but of course the test was done at low volume. The mic was on my lap in the drivers seat, facing toward the front of the car. This placement was easy to film Vid also upped to realm, and a graph is in the works. http://www.youtube.com/watch?v=PJSzrzOOcqM The response is very satisfactory - although the type R isn't the "tightest" sounding woofer, the response of the box makes it an awesome rap/etc setup.