I have a Synergy C-3 speaker and at certain sounds the tweeter seems to make a rattle or a funky noise. It sounds a little like a static or poping or rattle. I would like to diagnose and alleviate this problem.

 I have a Denon AVR-3300 receiver that has a rated RMS output of 105 Watts.The synergy is rated at handling RMS 150 Watts. I dont really push my receiver very much, never past 0 dB (which is the half power and highest safe volume I believe?). So I don't think my receiver is clipping or that I could have blown my speaker. 

 Sorry I don't have any more specifics on when the sound occurs, but its when Im listening to music at a louder level (around -15 dB ish) and only on some songs with a higher pitched melody I think.

What does anybody recommend? Can I replace the tweeter? Could it be blown?

Thanks for any help!