Originally Posted by Soundsgoodtome
Try putting an extra layer or two of felt between the drivers and your ear. You could try different thickness/layers/patterns to see what works. You might find a median of less timbre and still keep the vividness.
I'm listening to it now on my Matrix Mini-I, a warm/analog sounding dac+amp. When I want analytical and clarity, I plug it to my Yulong D100, keep it on low impedance port + sound2 (which rolls the highs a bit) and you've got replication without piercing highs. I like to keep it on the musical side, so it gets a lot of time with the Mini-i.
Hope you find your mod, these are fantastic headphones indeed
Better yet, get a microfiber cloth and cut a disk out of it an lay that down in the pad. I was having treble issues when modding my T50RP and I came across a user who used microfiber in front of the driver and he showed the results from his measuring equipment. Microfiber works perfectly to mellow out the treble in that region without touching anything else. I would definitely give it a try!
As MattTCG stated, getting the modulor pads will NOT fix your problem. The only part of the mod that helps the treble is cutting holes in the pleathers, which it sounds like you've already done.