Left Speaker is Magnificent.

But the right? Sounds like I am getting 65%. These are NHT 2.5i's.

I swapped to a different pair of speakers (NHT 1.5's) and they sounded even, as I would expect. Swapped left speaker to the right and vice versa and the suspect speaker sounded just as bad. I will bring them into a repair shop, but curious if you have any thoughts as to what it could be?

Thanks for your help!
Blown tweeter most likely. Take a paper towel roll put one end over it and your ear on the other end to see if you hear anything. Speaker has to be hooked up of course
If you can diagnose a bad driver you can replace yourself and get parts from NHT
Try reversing the speakers cable leads just on the "bad" speaker maybe is out of phase.