Ok I’ve been super lazy so here goes.
The Goldplanar GL2000 is a super polarized headphone. It’s the best tuning ever or the worst depending on who you ask and I personally like it both ways, but stock they just don’t work for everything.
Before and after for reference:
Before you start the mod, make sure you have a nice clean surface to do it on with no dust or metal around.
Start by removing the pads and pad mount ring AND KEEP THE SCREWS A FEW FEET AWAY FROM THE DRIVER AT ALL TIMES, THEY CAN GET SUCKED INTO THE DRIVER AND DAMAGE YOUR HEADPHONES:
Next, remove the driver from the housing removing ONLY the 5 screws circled below:
If you can’t get the driver to just fall out press lightly on the top of the grill mesh with a screwdriver and it should pop out:
Next step is partially optional as it doesn’t effect the sound much but it does effect the stage slightly. The grill has two pieces of mesh protecting dust from entering the driver housing. The left one is the one you would want to keep in for the least amount of effect to the sound but again this is optional.
Now on to the source of the “compression” sound, the tuning paper glued to the driver. If you’re careful you can reinstall this afterwards if you decide you don’t like the sound (fair warning it does get kinda bright):
Remove that and you end up with a driver that can breathe how it was intended to:
Put it all back together in reverse and you have yourself a modded pair of GL2000s with massively improved imaging, detail, soundstage, and far better tuning for the majority of uses, including gaming, which they are totally top tier in post mod (but don’t get me wrong, it’s good the way it comes for plenty of music tastes)
If you have problems with the sibilance they get with the mod you can cut out some felt and put it in the ear pads and it will smooth out the highs substantially.
Bonus: either a QC issue or they decided to put the felt cushion around the driver opening around the same time they changed to the D shaped hybrids. Original (left) and newer (right) and I’m not quite sure what its for, maybe to stop some slight rattle with the pad adapters or something.