RiseFall123
100+ Head-Fier
my serial number begins with M0552xx.
Thank you, mine is M056xxx, even newer than yours, with this whine on the end of charging while you don't have it at all. I little envy you.
I wonder if you are referring to reports of a loud hiss / noise that could be heard through the headphones (not just very low impedance headphones) that was in some early units. I had a tour unit that suffered from that anomaly and it was fixed for the rest of the tour. That issue was identified and fixed, but a few got out in the wild. I don’t think I’ve ever read that John said the charging coil whine was changed (and I’ve read every post of this thread from the beginning). There has been some confusion between these two different hissing/noise/whining sounds before.
With my unit (new and with a new serial number) I can say that:
- I have NOT any hiss on the headphone in every circumstances
- I have NOT any whine during the charging (even with my ear close to it), expept for the last 6 minutes
- I HAVE a whine (loud whine) in the last 6 minutes of charging, tried multiple chargers and two different cables.
Could be, I'm too lazy to go find it, bottom line is the end-of-cycle charging whine lasts about 10 minutes for me and it has zero to do with USB cords or chargers because I have many very high quality ones with intelligent voltage regulation, filtering, etc and the charging whine is instant no matter which cords, charger, outlet combination is used. Hey, maybe it's "normal" but it's weird and annoying, especially if some units have it and some don't.
Exactly my case.
It sounds like this: weeeeeeeeEEEEEEEEEEEEEEEEEEEEE[10minutes]EEEEEEEEEEEEEEEEEEEEEEEeeeeeeeeeeeeeerrrrrrrreeeeeee
Exactly, it's loud, louder than one can think.
The kind Rob assured me that is normal on some units and it's not damaging at all, now I have to struggle with myself If I want to give it back to the seller hoping on a replace that doesn't make the whine, sending back to Chord directly or keep my Mojo with this "issue".
I think that after the very kind Rob explanations I will keep it, but knowing that some unit is immune to this issue is not a great thing to me.