Originally Posted by mlxx
Jerg, could you help me out with a few queries please..
So far I have just cut out the vinyl to expose the holes underneath in the plastic ring and removed the foam ring, have been trying it like that but I can't say I notice much of a sound difference so far. Removing the foam ring however makes my ears now touch the driver. The vent mod might help this but it messes with the bass on the HE400. I was thinking of making some foam rings out of the same material as the foam inside the pleather pads and then thought doing this could also not require cutting any holes. Ever tried this?
I was also wondering if you have done any testing to come up with the size and location of the holes in your guide. Is that the best arrangement or is that something that you tried that worked well and stuck with it? Any reason why the smaller hole arrangement (like with the soldering iron above) wouldn't work as well? I notice that most factory made pads that have holes tend to have lots of smaller holes. Is the idea to have as much foam exposed (symmetrically) without compromising the structure?
If your ears touch the driver without the foam ring, then you should tuck it back in I think. Yeah you could go crazy and try whatever, no one is stopping you. As for the damping hole arrangement, what has been done is the most straight forward, but smaller but denser holes may work as well if not better (no one has done the soldering iron approach before the very recent attempt, that's why smaller holes tended to be avoided due to it being annoying to do them).
As always, if anyone feel they may be able to improve the mod design further, don't hesitate to try and share the results with us around here. It's an iterative community process.