This is EXACTLY why I'll never own an Audeze product again. I got 2 different farting sets of CRBN (which were, at the time, my 1st estats). Their customer service response was "yeah, that's normal, live it with". It's documented earlier in this thread if anyone cares to go read it. I don't react well to that kind of piss-poor customer service, especially on $4k headphones....
My 007's are good (my current estat listening headphones), but my x9000's are the cat's pajamas. I have not tried a Corina yet (maybe someday). The Shang Jr. is fine, but not for the retail price HiFiMan is charging for them (another brand I won't invest another penny in).
Now if I can only convince
@zach915m to make an estat....