So now that I've waken up and no longer as tired I decided to do the other side and imo I did a better job since it is much cleaner inside than before so it doesn't look like a 5 year old did these mods.
I took off the foam inside the cups to start a new:
Then I added some electrical tape over the bass vents and then added dynamat:
I lined the cups with silverstone acoustic foam:
I then added some modeling clay to the ring around the baffle and then put the acoustic foam on the modeling clay except for the additional ring I just put:
I then closed it up and put foam over the other side of the baffle except around the ring where the four screws which you need to open them up as well as the driver which I forgot to take a picture of (and too lazy to take one now since I put the O2 pads on already) but I ended up with this:
I believe these are all the RP2 mods by mrspeakers. If I missed something please let me know but to my knowledge this is the full mod.
I have electrical tape over the bass vents after removing the black felt, dynamat on the lining of the cups and then acoustic foam over that. I also removed the cylinder shaped foam things on top of those 4 tower things in the cups since they were being annoying when I was applying the foam.
I removed the stock felt over the driver and put some creatology felt, filled the holes around the baffle with modeling clay and then put acoustic foam over that and also applied modeling clay to the ring around the baffle.
Lastly after closing it up I put acoustic foam on the ear side of the baffle outside of the ring and where the driver is.
Also I removed the double sided tape (which was a huge pita due to the sticky residue that remained) so that it won't damage my pads like it did with the stock pads when I tried removing it. Some of the pleather is ripped because of that tape.
edit: Actually as I was looking at the pics I realized I put dynamat over the bass vents. Does that matter that much? I think I only did it on the right side but not completely sure. Does that really matter since it's covered with electrical tape and also the foam on top of that?
edit #2: I looked over the posts showing the RP2 and it seems that fatmat was used over all of the lining including the bass ports so I think I'm safe.
I've had almost an hour or so listening to these. I have to say I like what I'm hearing. The bass is much better quality and no longer boomy but that is my fault since I was too lazy to cover the bass vents after taking off the felt and did not have electrical tape then. What I am hearing is something very balanced. It is not analytical and not bass heavy. It is somewhere in the middle being close to neutral with a hint of warmth but that warmth may be due to my V200 amp since that is on the warm side. All areas of the spectrum is nice with the bass being of high quality, mids are nice and no noticeable peaks like before and the treble is much better refined without sounding bright.
I think with these mods I am done modding this headphone. It sounds great and I don't want to mess with it more but I do want to try one more modification after getting an idea from another member here. I am going to try the RP2 more and then try that mod and then see which one to stick. Either way these sound excellent with a nice balanced sound which is what I enjoy. Out of my V200 which has enough power for them they sound great and if I had nothing else I could be happy with just these but I do have other options such as my DT880, HE-4, etc. I like having different signatures for my moods so I won't be selling all the rest of my gear. I do want another pair of the T50RP to configure it to a more bass heavy version but not bass monster heavy. That's the great thing about these headphones is that I can tune it to my liking which I can't think of another headphone where I can do this.
Edited by rawrster - 10/15/11 at 8:50am