My right side tweeter has acted up once, it was at higher volume after I had to take my AV back to the installer for an issue with Onstar. The right tweeter (sep Focal components) sounded like it was getting way more music (?) whatever, I'm not up on crossovers and how they split everything, but it only happened once and it happened to be minus zero outside. It doesn't make sense to me that the cold could have an affect on this but I know certain components perform better after a breakin period and this is the first time I've had "enclosed" tweeters. At the time I was starting the truck and the amps were kicking in at about half power (volume) and I've had them cranked before and after at full. No issues since. I did buy my speakers on ebay and they seemed to be in the original packaging and I was able to get them way below what my installer's cost would have been. Right now everything is great, but I'm more careful about the volume as the amps kick in and I've yet to get in and crank up the power (volume) when my AV has been out in extreme cold. I'm still wondering if this has anything to do with the Onstar component? I have very high end stuff everywhere, but I don't know what's added to have the Onstar interupt the volume? Another tidbit, it happened while listening to XM which has it's own broadcast issues from time to time. regards... -pete