As kosst_amojan mentions, there is a metallic clicking sound right after I fully power off my Pass XA-30.8 (which does not happen when I put it into standby).
Is the popping coming from the unit or through your speakers. I have owned an x 250.5 for 11 years now and it will clink when it is warming up or cooling down. I think this is from the heat sinks expanding and contracting from the heating/cooling cycles of being off and on. It the sound is through the speakers then ya, a cap up the chain somewhere could be going or a tube
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