I bought these to use in my 6th order bandpass subs without looking too well at the T/S parameters and it turned out not to be the best because they're better suited for midbass use.
I was replacing everything in my old entirely smoked up JBL PRX415m cabinets, and thought i'd give them a try in there and boy, they sound so sweet in conjunction with Beyma CD10Fe compression drivers and Beyma FD250 xovers.
I'll update review after gigging with them.