Sorry for the ignorance - new to the audio end of all this:

I just bought a pair of Studio Monitors (M-Audio BX5's) and se them up. They sound great, but I noticed that on one of the monitors, the inner ring of the circular HF Driver (tweeter) is crinkled, while on the other speaker it is perfectly smooth. Should I be concerned about this and return the monitors? I'm sure I didn't explain this clearly, so I provided a link to the manual - the diagram is on page 6

http://www.m-audio.com/images/en/manuals/BX5_Manual.pdf

Thanks in advance for your help.