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Temperature effect on mic frequency response?

Is it possible that mic frequency response can vary with the temperature of the microphone? I recently used two Shure KSM-32 mics, that had been inadvertently stored at around 50 degrees F, to record a grand piano. These mics are generally pretty useful for the piano but the results in this case seemed better than usual.

I'm not sure I've eliminated all the other possible variables yet. In fact, the apparent better sound may be just my imagination.

Does anyone have any experience with, or knowledge of, this sort of effect? Of course, it may be relevant to just condenser mics or just the KSM-32.

Regards,

Michael
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