I wouldn't worry about it. I think it is REALLY unlikely that a ding like that would cause distortion in the reproduced signal. Anomalous dispersion, maybe. You might be able to measure a difference, but I'm skeptical as to that difference being audible. If you listen with the grills on, you'll probably forget about it. But, if it bugs you, CALL Axiom and somebody will help you out.

Nice marmot, btw.

bibere usque ad hilaritatem