they do look pretty strong,i still think you can get the same results with a single 10 inch W7, Im partial to JL i had them for years, my friends had sony, kenwood, kicker, MTX and my two 12 inch W3's non ported box blew theirs away and i only had an 800 Watt amp powering them, YouTube - 12 JL W7http://www.youtube.com/watch?v=i7d-f...eature=related
As for that paper test, check out this can
http://www.youtube.com/watch?v=078ff...eature=related