These pods are for 6 3/4 inch speakers. Just thought I would toss that out there for everyone. 6.5" speakers won't work at all... I tried the Memphis and my spare set of JL speakers. Both nearly fall through the hole. You might be able to make a 6.5" work if you were to redril all the holes and position the speaker where it is dead center. But it would not be recommended.
I have a set of Memphis MCX60 on the way. That should be the ticket...
If you are talking about the SSV headpods my JL C2 6.5" fit just fine(without any type of modification).