I would like to know this as well. If anyone has a link to an explanation of the Argon mod. I have some heavily moded mk3's that need a change up, and a set of open alphas that just arn't what I expected. Also what amp's are people using? I have a Fiio e18k that can do about 350 mW. I feel like it isn't enough to do the mods justice. Almost like they are gasping for more power.
I don't know what the argon mod is but I'm wondering if it would be malicious to post details about it? Very fine line there.
Would be nice to know how similar to the mayflower mods it is.
Argons are noted to have bigger sound stage and voiced bassy/slightly dark. I have not heard them.
Can't imagine the mods are anything but finely tuned versions or combinations of the mods as shown here. Maybe more professional implementation?
There is a limit to what you can do to these. The pads alone should make quite a difference.
I've done a few mods to my T40RPs.
testing between closed/open/semi. I prefer it closed with no mods. Open with mods (which makes it a little more semi because of cotton).
tape over the bass vents. currently 3 of 4.
Cotton in the cup. have 2 balls per cup.
ZMF oval cowhides
I do a low shelf at 250hz +3dB 15Q and it sounds pretty good to me. No other tweaking needed for my tastes.
I will probably continue to experiment. Long process as I listen for at least 7 days before trying/changing mods.
I use a JDS Atom and Modi3.
The T40RP are the ones I have to turn the volume control up the highest to achieve the same volumes. I'm at around 9 o'clock with HD6xx, He4xx and M1060Cs and closer to 11 o'clock with T40RPs.
I prefer my M1060Cs more than any of the other headphones I have.