Thank you for those suggestions. We'll pass them up to engineering for review. Regarding the noise you're hearing, my best guess is that it's not the product of a stretched membrane, but rather the issue is likely to be a byproduct of the wireless transmission itself. This is something we've heard scattered reports of, but it unfortunately doesn't appear to be something we're able to eliminate entirely as it's endemic to the chipsets that are currently available to us. In addition, due to the accuracy of our drivers being able to reproduce this sound more than would be apparent on other wireless systems running similar chips, we cannot rely on the same solutions other manufacturers have used for this particular problem.
Regarding your suggestions specifically, it may please you to know that we already have a form of your suggestion in place. If you swivel the earcup down on your Penrose, you should see three small vent holes underneath the curved "C" shaped yoke. These vents help prevent the drivers from being damaged due to overpressurization in the earcup. Stretched membranes are something that can happen over time on planar magnetic headphones due to our unique driver design, however, this is usually only an issue when it comes to extreme cases, and a slight pressure on the diaphragm will not change the sound in a measurable way (unless it's being stretched far more than it's intended to, like if you push the headphones down on your head and create a
very high pressure region inside the earcup).
While it can be mildly bothersome to a few listeners, this issue is not harmful to your headphones and you're free to continue using them. Normal audio should completely mask the issue for the time being. If you feel the issue may be present to a degree that we would not consider normal, please email
support@audeze.com and we can look into getting those headphones back to us for inspection"