Thanks for the warnings.
I'm being very conservative and I'm moving forward carefully.
Right now the things I like about the drivers is the speed and transparency.
What I did not like right away with the stock t50rp was:
1 - all the coloration from the flimsy plastic cans.
2 - congestion
3 - weak bass
4 - lack of space in the soundstage.
Yesterday I did these mods on the right driver:
Listening after every change:
1 - modeling clay on the driver
2 - modeling clay on the baffle
3 - removed felt on the vents
4 - removed the cover on the baffle ( IMO this one mod moved was very effective in clearing things up - more impact and transparency)
5 - 3 cotton balls in the cup behind driver
Still need to mass load the cups more but these few mods on the right side tell me I'm moving in the right direction.
already my concerns # 1 and 2 have been mostly resolved.
For concern #3 the bass has increased and is very tight so I might not need more but I'd like to research a little more and see if it is possible to increase bass without loosing tightness.
For concern #4 I think that has to do with the space between the driver and the ear.
Maybe that is where new ear pads come in.
I already experimented with some nomex just sitting on top of the driver
and I really like what it did.
It seem to my ear that it focuses everything - upper partials really sparkle
and there is better separation and more space between the instruments. ( maybe it helps with that 10kHz peak and also reduces standing waves? )
Edited by bachiano - 4/24/12 at 2:04pm