My MOD is focused in simply removing as much of protective plate as possible, I dont like solid difractive objects in the way of the sound.
Holes are not very neat, but again, in difractors realm, very regular shapes are not my cup of tea.
After I made the cuts you see in the pic I dumped a very lil enamel drop in the very center of the mebrane to break standing waves and avoid some slight glare in the upper mids.
If the result is a lil too bright for you and you prefer a more laid back upper mids, you can glue over the center cicular hole a very thin circle of foam similar in quality, density and thickness to the ear cushions´ foam.
The result is superb. The final product sounds louder, bass solid and firm, mids more transparent and extended highs. Gone that lil nasal tint.
NOTE. If you choose to perform this mod, make sure the enamel you pick does not attack the membrane material. Usually nail enamel will do the job safely.
Edited by sohho - 5/16/12 at 11:41pm