Energy C-2 Speakers Help

[WyattR]

I have a pair of Energy C-2 speakers that I got used off Kijiji. They were the first speakers I got, so I didn't notice anything was amiss until I listened to them for a bit.
One of the speakers sounds..different. It's hard to explain, but the easiest way is to say that on one, the treble, ESPECIALLY guitars, is muffled. It's not much quieter, per se, but it doesn't sound as crisp and clear as my other speaker, which saddens me because that speaker sounds fantastic.
I was wondering if anyone knew what could be causing this? Should I just get them repaired?

 

[Rifter]

are you 100% sure the polarity is not reveresed on the side that sounds off.

 

[WyattR]

Positive, but I figured out the problem.
I dsconnected the wire going to the tweeter (these speakers are biwired) and the sound didn't change. I did the same thing with the working speaker, and it sounded completely different. Definitely a tweeter problem, or at least something in the wiring.
Now I know that I either need a- a new tweeter, or b- to fix the wiring.

 

[Rifter]

Take it apart and check the wiring to and from the crossover to the tweeter. I had a cold solder joint on a Polk monitor 70 that i fixed easaly.