Happy to report that Firmware V1.10 released just yesterday and while it doesn't completely fix the timing errors/skips in USB DAC Mode on my setup (Win 11 64-bit), it makes them a lot more tolerable, reducing the frequency up to one occurrence every 2~3 min vs 20~30 sec before the update, also...

I meant no alterations without filter vs simple metal filter (no fabric), YES removing the filter reveals a big chunk of upper mids and treble, resolves congestion

I used a simple metallic filter, no alterations in sound and simple earwax guard, take note the drivers don't face directly the nozzle, you can't see them when shining a light inside, there is some kind of acoustic chamber going on and the nozzle is super wide, so I wouldn't worry too much about...

OMG you are absolutely right, it really does free the congestion and helps clearing the mid and upper ranges, idk why the congestion is not talked about as it is the first flaw I noticed, maybe it's an intentional tuning? Anyway your mod 10/10 would rip that dust filter again

They should really drop that shell...

@WendyLi please count me in, thank you