u/waxj1833

I ordered PX7 s3 on Amazon through their warehouse returned goods deals with an enormous discount. Condition was stated as Used - Very good. But when I received them today and inspected, they were pristine. In the original box, with the case and all the cables, user manual still unpacked and firmware not updated. No signs of wear whatsoever.

But I noticed a strange issue and I’m trying to figure out if this is normal or a defect. I wouldn't want to return them because they sound amazing and feel very premium. And return/refund is the only option in my case because few Used ones are sold out already.

The issue: From time to time I get this very subtle rapid “tktktkt” type sound in the left earcup. It’s very faint, almost like static or tiny clicking, and it only happens when I move my head.

What I’ve noticed so far:

• It only happens in ANC or transparency mode
• Completely gone when ANC is off.
• It’s only left earcup, never right.
• It’s not constant, comes and goes.
• If I fiddle with it, shift and adjust how the left cup sits on my ear, it often disappears.
• Clicking frequency increases when I move and turn my head.

My guess is that it's almost certainly has something with the ANC mics. Seems like they are picking up micro friction (glasses arm / beard / hair), or some slight hardware/mount defect in that earcup. But I’m not 100% sure.

I already contacted B&W support and they said it could be hardware related and suggested returning it while I still can, but they probably just playing it safe.

Has anyone here experienced something similar on PX7 S3 (or PX7/PX8 in general)?

Update: I think I figured out what the sound is. It's my ear rubbing against the microphone inside the earcup. I'm wearing glasses, so they push my ear outward, and since the padding is not very thick, one ear is rubbing because they are a bit asymmetric. When I push my right earcup with my hand so the right ear touches the inner fabric, there is the same sound from the right.