Chad,
With an incorrect amplifier match (I won't name any lest I start a war) I agree that Thiels CAN sound a little edgy or grainy BUT any speaker can be mismatched.
Also, and this is very important, it could be Thiels simply don't suit your preferences. There are some very popular speakers (again no names) that I would never buy because they don't please my ears.
Good luck.
With an incorrect amplifier match (I won't name any lest I start a war) I agree that Thiels CAN sound a little edgy or grainy BUT any speaker can be mismatched.
Also, and this is very important, it could be Thiels simply don't suit your preferences. There are some very popular speakers (again no names) that I would never buy because they don't please my ears.
Good luck.

