This was the full article -

http://www.caraudiomag.com/testreports/ ... rsd12.html

I've seen different recommendations.. The PG manual says .78ft^3 (SPL) and 1.2ft^3 (SQ). In a CA&E test report, the author says.. I called Errin Keeling at Phoenix Gold, who turns out to be the guy who did the final in-car listening and enclosure recommendations. So, Keeling would be the correct...