mchan888,
Congrats on obtaining a pair of CS 7.2 speakers. '
I'm right there with Tom that something is going on as the CS 7.2 has ample extension in the higher frequencies.
Placement will be slightly different than your CS 3.6.
This was a big factor with my CS 7.2 was ear placement to appropriate driver. It will be different than your 3.6.
Another area to go over is amps and electronics. I have a few pairs of Thiels and everyone has a different amp I prefer. You dial them in with the right room (Thiels are very unforgiving with bad set uo/room) andyouwillbe grinning ear to ear. They are that good.