Here i removed the black damper, but not the foam.
The headphone become a little bit more airy, i think this because the noise cancelling is less without the damper
More trasparent, detailed and little better image, for some reason to me the drums ( mids ~ or lower treble ¿? ) get more impact, with black damper the drums sound sweet-smooth, for example the guitars sound with less body and get more bright, for me that black damper is not the best option FOR ME imho.
I think without the black damper EFO sound neutral-natural.
I'm really interesed in change the black damper for a white damper.
Mrspeakers said the white damper starting around 1khz, yesterday i do some EQ in 1khz - 2khz without the black damper and wow... i really love them.
my last test was wrong apparently ( my new burson don't had the full burn-in ) , my problem of brightness was in that range ( 1khz - 2khz ) not in 7 and 13 khz~ as show the Frecuency response, so i do little EQ in that area, is really easy.
Now with the little EQ in 1-2khz, 3.5 or 2.5~ dB ( i don't know wich is better because i found that yesterday, i am still testing wich EQ can be better for me) sound trasparent, punchy, smooth with really good level of detailt, definaly an all rounder.
But that was my ears!, i think this thread is for share the opinion so here is my opinion
*Is easy remove the black damper and put it together with the foam again...*
This headphone have big potential
Best regards
update: today i finded my final EQ
Peace EQ, Q:3, -2,5 in 1800hz and 2500hz without the black damper, only with the foam, it was a really hard job...