so after trying out many used monsoon speakers for the sail panels in my trans am, and they kept blowing (im sure the age of the speakers by now didnt help) i did some research and found this link thru ls1tech....
http://www.keeaudio.com/bazooka.html
its a 6.5in DVC Bazooka Subwoofer. i bought a pair and installed them and they work great, sound great and were cheap.
just a heads up for all u guys with birds with the monsoon system
they also sell package deals for all the speakers in a 4th gen fbody, seems like they are a small company that actually knows our cars... which helps!