Originally Posted by
BRSracing
Mine does the same thing. Sounds identical. I believe it’s the fan when it gets warm and hits the higher RPMs. If you have had two and they both do it as mine does I’m gonna say it’s normal. It’s annoying in a quiet house but can’t hear it at the track with all the noise. I’ve wondered about mine as well.
Thanks for confirming. It's odd to me to have a "high" end charger mage this noise. The S6 I picked up used is quiet as can be even with fan nose. Hobbytown had another replacement sent. I thought about cancelling that and going with the 456 Duo. Junsi's support was no help.