My modified T50RP is still considerably less than my Magnums

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armaegis said:

Pfft, since when have we ever let silly things like weight, comfort and cost get in the way of audio? 

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Never, that's when!
 

I damped the baffles with modelling clay (I mean really really damped, I put modelling clay all over it), and put a layer of dynamat on the cups, and I still think the weight is fine.  I had a piece of foam stuck on the headband (from a bike helmet), and the headphones are reasonably comfy.  I probably can't wear that thing for 5 hours in a row (and I won't as I just don't have that kind of time), but I would say wearing them for 2 or 3 hours in a row is not out of question.

How does everyone put on new pads -- e.g., glue??

@LFF

I wanna PP Pants. :tongue_smile Does that mean I don't get one?

I wish the people who've heard the Paradox would comment too.

tim_j_thomas said:

How does everyone put on new pads -- e.g., glue??

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Almost all of them slide on. Some glue / stitch or Jimmy rig, (LCD-2, some beyers, FA 003)

Actually I think LCD-2 can be slid on, but I think you glue on once you've decided right where you want it.

armaegis said:

Tungsten putty... 0.725 
Has anyone ever tried this stuff?

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http://qualia.webs.com/apps/forums/topics/show/3522816-tungsten-loaded-putty

For all those wondering what this stuff is, if you turn the package over, toward the bottom you will see the following: Hospital Name: 3M Micropore Surgical Tape. So, this stuff is just Micropore in a retail (consumer) package. You can get it at any Walgreens, CVS, etc.
 
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flysweep said:

I took the "craft felt" off the driver backing tonight & stuck 3 layers of 3M gentle paper in it's place.  I really like what I'm hearing.
 
What I noticed right away is that the massive bass slam is gone.  There is still excellent extension and punch, but the volume of bass is a far cry from what I heard with the craft felt.  The bass is much tighter, nearly armature-like in nature.  Back came the airy, clean mids and super crisp, detailed treble.  There is ton of energy from the midrange all the way up to through the treble.. I'm perceiving a slight upper midrange spike as a result of the brighter sound.  I'm also now able to hear how closing all the vents results in the bass "disappearing."  I've cut slits in all four slots on both cups to increase bass impact and it's working well.. but the bass isn't nearly as textured as it was with the craft felt.
 
They sound much closer to stock form.. but with the cup resonance fully attenuated.  I'm going to experiment with adding more layers of this 3M tape.  If there is anything to take away from all this, it's that there is material available as a replacement for the stock "white felt/paper" for those who had mangled it beyond repair/reuse in the process of removing it.

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hennyo said:

@LFF
I wanna PP Pants.

:tongue_smile Does that mean I don't get one?
I wish the people who've heard the Paradox would comment too

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What are PP Pants? Sounds like a toddler who drank too much water....
 
My headphones are simply called "Paradox".
 
Hopefully some of the people who have heard my Paradox will start to comment. I can't force them either.
 
 

Okay. Installed 3 layers of Micropore breathable, gentle to skin tape...
I lost the bass and the mids. Treble's like DBAs.
 
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dogears said:

Okay. Installed 3 layers of Micropore breathable, gentle to skin tape...
I lost the bass and the mids. Treble's like DBAs.
 
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Sorry about the bass and mids....

No worries mate. We're learning from the Micropore tapes Shall we start a new thread: Micropored Fostex T50RPs
 
Okay, bass (pun intended) on my theory - we can tune the bass based (no more pun here) on how much squares we leave open behind the driver. So I just removed the tape covering 3 rows of squares and the bass is back
 

So just apply according to your taste
 
I'll bring back my recipe on the back of the driver

dogears said:

Okay. Installed 3 layers of Micropore breathable, gentle to skin tape...
I lost the bass and the mids. Treble's like DBAs.
 
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Mids too? hmmm.. 
 

New information to share with the gang.  Photos below.
 
Chain: MacBook Pro with lossless files --> Toslink to Dacmini --> Modded T50RP's
 
My reference phones are BMF's without the Organdi.  I re-installed the stock white felt and added the following mods:
 
1. Paxmate Plus - 1 layer in the cup bottoms
2. Plasticine in back of baffles
3. Stock white driver felt back in place
4. Stock black bass port felt in place
5. Ring of Paxmate under ear pads
 
This combination is the most pleasing to me and better than "all-stock" T50RP's.  They are neutral, balanced, and non-fatiguing.  The bass is fast, textured, and deep without the SLAM I got from using felt or Organdi in place of the white driver felt.  Further, there is no mid-range muffling from bass bloat bleed-over.  The mid-range is crystal clear with some air around the vocals, fairly prominent, but not in your face.  The treble extends further than I've accomplished, so far, with a lot of air.  I love the way they sound --> my best, yet.  
 
Over the past 3 days, I have been busy testing mods.  Each mod was made one at a time and immediately compared to my BMF reference cans described, above.
 
I began with naked drivers and all other mods listed, above.  I tried 1 to 4 layers of Organdi, each with and without a reflex dot.  That uncontrolled, slamming bass was still present with 1 or 2 layers and the mids were too muffled with 3 or 4 layers.  The reflex dot had no apparent affect on the attenuated treble.  So long, Organdi (unless you want a second set of cans with Kick A** Bass).
 
I started over with naked drivers and used "3M Nexcare gentle paper" tape.  The back of the package says "Hospital name: 3M Micropore Surgical Tape."  I tried from 1 to 3 layers as described by FlySweep.  Although better than the tin can sound I got with generic "Rite-Aid paper tape," they still sounded awful.  There was no sub-bass or low-mids at all.  The upper mids through treble frequencies were screaming uncomfortable and hollow.  For me, "3M Nexcare gentle paper" does not work.
 
Naked drivers once again.  I tried 1 to 3 layers of "3M Nexcare flexible clear tape." The back of the package says "Hospital name: 3M Transpore Surgical Tape."  It has numerous perforations that allow just the right amount of air movement/driver excursion and adheres easily. Right off the bat with just 1 layer, I knew I was onto something great.  With only one layer of this tape, the cans opened up nicely but still had a tad too much sub-bass, slightly muffled mids on vocals, and veiled treble with no air at all.  Two layers was better and three layers much, much better than 1 or 2.  With each layer, the sub-bass was progressively controlled and the mids and highs unveiled.  Further tuning with a reflex dot better suits my tastes and hearing range.  This fourth set of modified T50RP's sound just like my third set used as my reference for these mod comparisons.  Closing off 1 to 3 bass port slots with electrical tape over the stock bass port felt allows for fine-tuning the bass:  the more slots covered, the less bass you get.  Closing all 4, however, resulted in a hollow, "in a well" type of sound effect superimposed over everything.
 
Conclusion:  With my preferred mods listed above, including stock white driver felt in place, I was able to sonically match their sound signature substituting "3M Nexcare flexible clear tape (3M Transpore) in place of the T50RP stock white driver felt.  This tape may be your solution if you mangled your stock white driver felt and want an equivalent to take yours back to stock SQ.  As always, your results may differ.
 
For a summary of various mods and their possible effects:
 
See post #2647 at --> http://www.head-fi.org/t/452404/just-listened-to-some-fostex-t50rps-today-wow/2640#post_7768186
 
For a copy of this summary with step-by-step pictures, email me at bluemonkeyglider@gmail.com
 
 

 
New and Improved BMF's - Modded set #4
 
Paxmate Plus in cups, Claytoons plasticine in baffles, Stock white driver felt removed, 3 layers of "3M Nexcare flexible clear tape ( aka Transpore )" over the back of the drivers, furniture bumper for reflex dot at center position of driver grid, Stock black bass port felt in place and no additional bass tuning, and a ring of Paxmate under stock ear pads.
 
 
 
 

 
These did not work with my set-up at all!
 
 

 
Reflex Dots
 
 

 
A new contender?

^^Yep (editFlySweep). I think the "breathability" should fix the mids. Blockage = Highs. Breathability = Mids. Open = Lows.
And it's not your 'fault', FlySweep --- I only have fiberfill in my cups
Will try some config...

Good stuff, BMF.. I'm going to pick up the tape you mentioned and try it out too..