Need some help from someone with some audio/promedia knowledge. I have some Klipsch Promedia V2 400's and the 6.5" subwoofers have blown (foam ring damage). I was looking for some suitable replacements but haven't been able to find info on the web concerning this, most issues have been amp/control pod related. I'm just assuming I need 8ohm rather than 4ohm subs. Do these look suitable or maybe something else?