New 22mm (km184/kk105 style) Capsule

[pmfalcman]

However i am not sure if the issue was in the lack of air volume, or if the edges were creating internal reflections.

Thanks, I see what you mean.

But I couldn't help but notice that new slots have quite jarred edges. Wouldn't it introduce micro-reflections/diffractions?
I guess the speed of the air is too low to consider effects of turbulent flow (diminishing effective opening).
I'm not savvy enough to know at which point "bad" edge starts to matter acoustically.

 

[kingkorg]

But I couldn't help but notice that new slots have quite jarred edges. Wouldn't it introduce micro-reflections/diffractions?

You need to take sound wavelength into the account.

 

[Paul W]

Is there anything tricky about disassembling and reassembling these before/after modding the slots?

 

[kingkorg]

Yes, unfortunately. Trickiest part is to make sure the tightening ring is not over tightened (this wrinkles the diaphragm), and there are no debris between the diaphragm and the backplate. This is tricky as the diaphragm can't be seen properly under the front grille/plate. I have done reassembly several times without the grille/plate in order to make sure everything looks nice. I eventually assembled everything once I was certain no dust was trapped under. Measurements also confirm all is good. This is particularly challenging with stock spacer because it is so slim. Also important to remember how the holes between the metal and plastic transparent backplate are NOT ALIGNED!

In theory the slots can be drilled through or filed without disassembly, but you have to make sure no debris is left behind.

 

[pmfalcman]

You need to take sound wavelength into the account.

OK, I got it.
I was thinking of terms of airflow not sound wavelenghts

 

[pmfalcman]

One of my capsules developped a hum. It wasn't there and then it was. It wasn't dropped, dessicating packs didn't help, so not a question of humidity.
Constant white noise. So it prompted me to disassemble it and perform Kingkorg Mod, thinking: it's probably gone anyway, I can experiment freely. If it dies, it dies but I will learn something (never disassembled a capsule before, all these microns inside creep me up a bit).
Couldn't find my file so I drilled it. Put together and it lives. The hum is gone.
Sooo... I modded the second one. It survived as well.

One has easily visible spacer (red), the other one has probably a transparent spacer (would it work without one?). All I could see was a glistening ring. No, I wasn't brave enough to touch it.

Right from the start they had different sensibilities. Quite pronounced difference in levels. After swithing bodies (CM-60) the difference diminished significantly but is still there. This didn't change after the mod.