Hi,
i am thinking about building a ported box with either the actual GPA 416-8C
http://www.greatplainsaudio.com/downloads/416_8C.pdf

or the actual GPA 515-C
http://www.greatplainsaudio.com/downloads/515_C.pdf

I will use them in a 2-way setup with x-over @~700Hz.

Does anyone have some experiences with those new woofers?
How reliable are the T/S parameters?


Kind Regards
Barossi