I haven't updated mine in a few weeks so will check for an update later.
On PS5 they aren't the loudest I've owned but there is still enough headroom for me so I never need to use them near max volume. I'll check how they are with PC later and report back once I've checked for an update
I got the Altas Air and after updating the firmware there was quite a volume drop in Windows using the wireless trasmitter, probably around 50% lower. Volume levels using bluetooth are fine.
It's not a problem as around 90% is fine for me gaming but I guess it will be fixed in a future firmware update.