@ soulhacker
2 of them got installed in a vitz, which was made as a demo car .
They were hooked up to a 2500d, and trust me it was the loudest and lowest thing i ever heard :).
i gave em the cd of the song The Dream- I love ur girl. As the box was 8 cuft and tuned to 30hz, it popped ears like crazy on even 32hz :-!.
So Yeah Really