PIONEER 12" FLAT SUBS

HAS ANYONE SEEN THOSE NEW PIONEER 12" SUBS THAT ARE FLAT, THEY SAY THEY ARE THE SIZE OF A AA BATTERY.
I WAS LOOKING TO PUT TWO OF THESE SUBS UNDER THE BACK SEAT OF MY X-CAB F-150.

HAS ANYONE EVER TRIED THESE SUBS, OR KNOW ANYTHING ABOUT THEM. ANY REASONS WHY I SHOULD OR SHOULD NOT BUY THESE SUBS. ??? HELP PLEASE.