Subwoofer Article

Hello All
In the late 70's or early 80's a US Magazine listed an article about the "Perfect Subwoofer" which was based on 2 JBL 2235s in a single cabinet. The cabinet was made from cement and was "HUGE" but it had great frequency response. Has anyone seen or remember this article or can link me? JBL had an article based on the 2245 which I have seen.
Thanks Kevin

I have a copy of an article called "Certified Bass for the Certifiable," published in Audio January 1990. It describes a twin 2235H subwoofer with a 22.9 cubic foot box. Are you sure this isn't the article you are thinking of?

Hello Sir

I would love to see that article!