Just listened to some Fostex T50RPs today... WOW!

Like I said I install the disc flat behind the driver. The corrugaleted holes allows air movement from drivers back. I hope I'm clear enough 
Quote:

symphonic said:

Sweet looking gadget Twinster. Have you also tried having the corrugation face the driver? 
 


 

Click to expand...

 
 

Now, That is clever And unique!  Excellent, thanks for sharing.
 
Quote:

twinster said:

Long time no post here but I have been experimenting with different configuration and I would like to share a new mod That is very successful in my setup. I used thin cardboard stripe to make a "Sound Wave Reflection Filter" behind the driver and the result is very good (IMO).
 
Basically I removed the cotton and fiberfill and line the cup with Paxmate and add this round cardboard filter behind the driver. Try it and let me know what you think.
 
Here's some picture of it.
 

 

Click to expand...

 

Hey everyone,
 
I just wanted to share something I did last night which without a doubt worked really, really well. I've briefly read through the different mods in the summary page and haven't come across this particular one. If however, it's already been dicussed, then please pardon my redundancy.
 
Basically, I tried stuffing some blutack in the driver baffles. I didn't have any plasticine or other putties that have been mentioned on hand. Blutack, however, I always have lying around... what self respecting audiophile hasn't? Interesting little article I read recently: http://www.tnt-audio.com/clinica/bluetac_e.html  - notice he omitted headphones in the article... Anyway, I really disliked what it did to the sound, which I found to be lacking life or energy or something. I tested them with several tracks and found that the blutack just dulled the music, I don't know how else to say it. So I ended up opening them up, once again, and I proceeded to take the blutack out.
 
One of the major issues I've had with these headphones, from day 1, was that the sound seemed to be out of balance. The image was always slightly shifted to the left channel. This was especially noticeable with well recorded vocal thracks that I knew had perfectly centered vocals. With the Fostex they were always slightly (like maybe 5% or less) shifted to the left. Has anyone else noted that?
 
Well it turns that there are gaping holes on both sides of the locking mechanism for the plug. I'm sure if you were to measure the holes they would add up to another vent on the side. So I plugged these holes up with my little sponge cubes, really tight like, and voilà! Perfectly centered vocals and everything else seems to jive much better, and not surprisingly so! Everything, everything depends on balance. I imagine someone could shave those little "locking bits" off of the cable plug and permenantly cover the holes with blutack or something.
 
So there it is. What I've got now sounds super nice:
- a handfull of 1/8" - 1/4" magic eraser cubes in the cups behind the drivers (and tucked into the aformentioned holes)
- a thin layer of 100% polyester batting (fake snow from the dollar store) between the drivers and back cups, holding the little cubes in the cups
- vent felt in place, vents fully open
- 840 pads, angled with stripes of magic eraser
- LFF's headband mod
 

Quote:

hans030390 said:

I also have some advice regarding the suspension headband mod. I followed LFF's instructions with paper, but I think I folded mine one less time than he did in the end. Mine is almost square shaped, and his looks more "thin". Either way, I basically wrapped that paper in a layer of black duct tape before punching holes in the ends. I figured this would look better and be much sturdier. I then took one of the stock earpads from the T50RP and cut the "flap" off around the edges of the pads. I then used duct tape (rolled it back on itself) to secure the neutered stock earpad to the underside of the suspension headband. 
 
It looks really, really goofy, and the stock headband is extended upwards as much as possible. However, the earpad acts as a really nice cushion for my head! I found that the suspension headband itself, while still much more comfortable than the stock headband, made the top of my head hurt after a while. The earpad cushion has minimized the problem!

Click to expand...

Best looking, comfortable, easiest headband mod, took headband cushion off my HD280s,electrical tape on top to cover the gap, looks OEM, super comfy. The suspension system can't compare in comfort and ease of implementation.
 

Best headband mod, here is all you need to know. Don't have pics of mine but basically used the pad from my HD280s, you can look at any ad for them online and see what it looks like. It fastens on top with a ziplock type fastener. This looks OEM after closing the gap on top with black electrical tape, (T50RP headband slightly wider than HD280). They are available at "Sennheiser Parts" for $4.91 plus shipping. Part#083321. These are currently on B/O at Sennheiser, but I was told they would be back in stock in a couple of weeks. Super comfy, looks great!

Quote:

raypierrewit said:

Well it turns that there are gaping holes on both sides of the locking mechanism for the plug. I'm sure if you were to measure the holes they would add up to another vent on the side. So I plugged these holes up with my little sponge cubes, really tight like, and voilà! Perfectly centered vocals and everything else seems to jive much better, and not surprisingly so! Everything, everything depends on balance. I imagine someone could shave those little "locking bits" off of the cable plug and permenantly cover the holes with blutack or something.

Click to expand...

I'll have to look into that. I've also noticed a slight channel imbalance, and I've always wondered if that plug had something to do with it.

 
Quote:

twinster said:

Long time no post here but I have been experimenting with different configuration and I would like to share a new mod That is very successful in my setup. I used thin cardboard stripe to make a "Sound Wave Reflection Filter" behind the driver and the result is very good (IMO).
 
Basically I removed the cotton and fiberfill and line the cup with Paxmate and add this round cardboard filter behind the driver. Try it and let me know what you think.
 
Here's some picture of it.
 

 

Click to expand...

You can achieve a more symmetrical shape and design by gluing small straws together to form a disc. This is one of the first mods I tried. Works rather well when properly implemented inside the cup. Good job Twinster and way to go with something more unique and different thinking!
 

I was thinking that the irregularities and the paper would have better effect on sound waves. Also It's more ECO Friendly . Thanks for the good word.
 
Quote:

lff said:

 

You can achieve a more symmetrical shape and design by gluing small straws together to form a disc. This is one of the first mods I tried. Works rather well when properly implemented inside the cup. Good job Twinster and way to go with something more unique and different thinking!
 

Click to expand...

 

i use butterflies as dampen material. makes the tone delicate,swift, and sweet.

On a side note, does any of you saw  this thread? I'm just amazed of the talent / Genius ideas that peoples comes up with.
 

Quote:

rexaeterna said:

i use butterflies as dampen material. makes the tone delicate,swift, and sweet.

Click to expand...

I used a dung beetle and the sound was sooo crappy! Should have tried a butterfly!!!
 

Quote:

twinster said:

On a side note, does any of you saw 

 this thread? I'm just amazed of the talent / Genius ideas that peoples comes up with.
 
 

Click to expand...

 
Those headphones in that thread are so damn gorgeous..... 

twinster said:

On a side note, does any of you saw :eek:  this thread? I'm just amazed of the talent / Genius ideas that peoples comes up with.

Click to expand...

i liked the screws.

EDIT: dang it. how do you resize photos? so they don't come out super huge on me when i quote them.

lff said:

I used a dung beetle and the sound was sooo crappy! Should have tried a butterfly!!!

Click to expand...

man, should went with a rhino beetle instead. it will make the deep bass extension strong,forceful and with lots of authority.

Quote:

lff said:

I used a dung beetle and the sound was sooo crappy! Should have tried a butterfly!!!

Click to expand...

I used just dung (my own, that is). Mmmm.