Repairing these noise-cancelling headphones could be harder than it looks

Repairability advocates iFixit have performed the first partial AirPods Max teardown, and it’s bad news for anyone who might want to poke around inside Apple’s premium noise-cancelling headphones.

The main issue seems to be that the speaker cover is secured with glue, meaning iFixit could only access the 40mm drivers by heating up the AirPods Max to a glue-melting point. 
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https://www.tomsguide.com/news/airpods-max-teardown-reveals-some-bad-news