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Just listened to some Fostex T50RPs today... WOW! - Page 679

post #10171 of 10873

hey, i started a BMF mod a year ago, but school got the better of me and I wasn't able to finish the mod. I ended up forgetting about it, but I'm thinking of retrying the mod. I still have the necessary guides and materials, I just need to finish the mod. Has anything changed since April/May 2012?

post #10172 of 10873
Quote:
Originally Posted by SkinnyPuppy View Post

hey, i started a BMF mod a year ago, but school got the better of me and I wasn't able to finish the mod. I ended up forgetting about it, but I'm thinking of retrying the mod. I still have the necessary guides and materials, I just need to finish the mod. Has anything changed since April/May 2012?

Correction. I misread 2012 as 2013:

 

No for DBV3 except is my current config found after Graph 55 in Incremental Mods and Measurements and labeled "Simplified and Consolidated DBV #3 Tutorial' and "Pictorial." Rite Aid Natural Absorbent Cotton is no longer available but there is now the option to use Rite Aid First Aid Cotton Balls Or "Prepared" Rite Aid First Aid Rolled Cotton. Steps for preparing Rolled Cotton and J&M Fiberglass are listed and shown in the same section along with "Tuning Rules of Thumb."

 

Yes, for Grodan Rock Wool Mod. I think I've improved this mod which now sounds very similar to DBV #3. The tutorial is in the same section as DBV #3. The Grodan Rock Wool Mod is easier to build but you must cut the rock wool to a uniform thickness. This mod uses No cotton, No fiberglass, and No Modified Bass Port. Optional based on your overall build and sound preferences: Stiffened felt (with or without holes), 18 mm treble reflector disks, and/or 4 mm modified bass ports (at the cup vents, not the ear side baffle ports).

 

FWIW, I'm getting similar sound by substituting custom cut pieces of Paxmate Plus (or Silverstone) for each of the rear baffle compartments in place of Newplast (or Plasticine). This seems to work in both DBV #3 and Grodan Rock Wool Mods, eliminating one modding component from the configuration and making the headphones a tiny bit lighter...YMMV.  I'm guessing that, since the sound is similar, mass loading the baffles doesn't do much (anything?) for mechanical damping but takes up internal cup volume which increases internal cup pressure. Substituting Paxmate for Newplast takes up the same amount of internal cup volume as Newplast, matches (?) the internal cup pressure of Newplast, and adds acoustic damping whether needed, or not.

 

I plan to re-try a mod component I tried last year: I cut 4 x 70 mm strips of Paxmate and laid them vertically in the cup floors about 5 mm apart. I cut ~ 4 x 25 and ~ 4 x 40 mm strips of Paxmate and laid them horizontally on top of the first layer followed by a third layer of vertical strips (and possibly a fourth layer, if there's enough room). This creates a "cross hatch" arrangement with numerous empty spaces and multiplies the surface area of the acoustic foam. To this, I'll add custom cut pieces of Paxmate for each of the baffle compartments. I plan to try this initial build and then compare/test with single and combinations of these components: stiffened craft felt over the back of the drivers, treble reflectors, modified bass ports, and different pads.


Edited by bluemonkeyflyer - 5/12/13 at 8:43am
post #10173 of 10873

BMF's rock wool mod is the simplest of all his mods to apply. It has few variables to fiddle with — really just the size of the rock wool slab. And unlike other rock wool mods I've tried, this mod uses a relatively small piece of rock wool, just big enough to cover the back of the driver, while generating very impressive sound quality. 

post #10174 of 10873

I'm slowly starting to mod mines, I ordered the classic 840 pads. Hope they will improve the sound and comfort to start with. 

 

Has anybody tried to curb the metal arms? I'm almost sure that it would improve weight distribution as comfort, since no matter how big should be the headn it would actually follow the headband pattern. Could also improve the look. Still would need a custom mount I guess.

post #10175 of 10873
Quote:
Originally Posted by jasonb View Post

Well I just ordered the Alpha pads. If I for some reason like my 840 pads better, I'll just list the Alpha pads for sale on here. Do they need to be attached with the fabric tape like the 840 pads, or are these a more snug fit with a better seal?

 

They just fit....

post #10176 of 10873
Quote:
Originally Posted by mrspeakers View Post

They just fit....
That they do.


On another note, Fostex's upcoming KOTORI 301 (probably will be this name?) has a interesting cable we can use on the T50RP.
Hopefully they can be bought separately.
The L side is threaded so we can be sure it fits in the stock jack on the T50RP.
Thick cable, gold plated plugs (so no problems like stock t50rp cable), and with one section coiled.
Of course thick cable might not mean much for the actual wire gauge but it seems heavy duty at least, and not super long like the vmoda.
They might all be super colorful though haha

**EDIT** a picture of the stuff. This picture didn't turn out very nice but shows the entire cable.

Edited by kalbee - 5/16/13 at 7:58pm
post #10177 of 10873
Quote:
Originally Posted by kalbee View Post


That they do.


On another note, Fostex's upcoming KOTORI 301 (probably will be this name?) has a interesting cable we can use on the T50RP.
Hopefully they can be bought separately.
The L side is threaded so we can be sure it fits in the stock jack on the T50RP.
Thick cable, gold plated plugs (so no problems like stock t50rp cable), and with one section coiled.
Of course thick cable might not mean much for the actual wire gauge but it seems heavy duty at least, and not super long like the vmoda.
They might all be super colorful though haha

**EDIT** a picture of the stuff. This picture didn't turn out very nice but shows the entire cable.

Do you have any more info on those?

post #10178 of 10873
Quote:
Originally Posted by Hutnicks View Post

Do you have any more info on those?

Hm... not too much.

They're the latest addition to the KOTORI line, yet to be released (around July, if all goes well).

http://kotori.fostex.jp/

The KOTORI line lets you customize the colors on your earphones for practically every part, though with preset parts color.

You can click on this link to start trying to design with the 201: http://kotori.fostex.jp/201/set

 

The (probably called) 301 are dynamic supra-aurals, probably 40mm in diameter I forget. I do quite like the sound.

They're very comfortable. The exterior finish feels like one of those matted, rubbery finish.

The cables are probably the thickest I've seen on portable headphones. Price, I've no idea.

The build quality felt very solid, and a bit on the heavy side. I did see some metallic parts, but probably there's a lot more of that under the rubbery skin.

As for availability of cables sold separately, I did ask the lady at the booth if that would be possible and she said they're hoping it would be. Hence putting them out for preview and feedback. Gave me a mousepad for filling out the feedback form :D

 

So, if anyone were to want to use these as shells for other planar magnetic drivers, I am not convinced the T50RP drivers would fit, but SFI's will.


Edited by kalbee - 5/16/13 at 9:34pm
post #10179 of 10873
Quote:
Originally Posted by kalbee View Post

Hm... not too much.

They're the latest addition to the KOTORI line, yet to be released (around July, if all goes well).

http://kotori.fostex.jp/

The KOTORI line lets you customize the colors on your earphones for practically every part, though with preset parts color.

You can click on this link to start trying to design with the 201: http://kotori.fostex.jp/201/set

 

The (probably called) 301 are dynamic supra-aurals, probably 40mm in diameter I forget. I do quite like the sound.

They're very comfortable. The exterior finish feels like one of those matted, rubbery finish.

The cables are probably the thickest I've seen on portable headphones. Price, I've no idea.

The build quality felt very solid, and a bit on the heavy side. I did see some metallic parts, but probably there's a lot more of that under the rubbery skin.

As for availability of cables sold separately, I did ask the lady at the booth if that would be possible and she said they're hoping it would be. Hence putting them out for preview and feedback. Gave me a mousepad for filling out the feedback form :D

 

So, if anyone were to want to use these as shells for other planar magnetic drivers, I am not convinced the T50RP drivers would fit, but SFI's will.

 

You must be clairvoyant. I am thinking about a new home for some Yamaha YH3 drivers.

post #10180 of 10873
Quote:
Originally Posted by Hutnicks View Post

 

You must be clairvoyant. I am thinking about a new home for some Yamaha YH3 drivers.

I don't quite remember but were the YH3 drivers the same size as the YH2 drivers? If so I'm not entirely sure it would fit, or at least be able to stay centered...

 

If anything due to the tab that sticks out on one side. If you bend it, might work out just fine.

OH, right. The cables on these KOTORI are removable, and there's a jack on both side. So might need to rid of that setup before YH-3 drivers can fit.

(and we should probably bring this back into the ortho thread since we're not going about the T50RP anymore ph34r.gif)


Edited by kalbee - 5/16/13 at 11:49pm
post #10181 of 10873
Quote:
Originally Posted by kalbee View Post

Hm... not too much.
They're the latest addition to the KOTORI line, yet to be released (around July, if all goes well).
http://kotori.fostex.jp/
The KOTORI line lets you customize the colors on your earphones for practically every part, though with preset parts color.
You can click on this link to start trying to design with the 201: http://kotori.fostex.jp/201/set


The (probably called) 301 are dynamic supra-aurals, probably 40mm in diameter I forget. I do quite like the sound.
They're very comfortable. The exterior finish feels like one of those matted, rubbery finish.
The cables are probably the thickest I've seen on portable headphones. Price, I've no idea.
The build quality felt very solid, and a bit on the heavy side. I did see some metallic parts, but probably there's a lot more of that under the rubbery skin.
As for availability of cables sold separately, I did ask the lady at the booth if that would be possible and she said they're hoping it would be. Hence putting them out for preview and feedback. Gave me a mousepad for filling out the feedback form biggrin.gif

So, if anyone were to want to use these as shells for other planar magnetic drivers, I am not convinced the T50RP drivers would fit, but SFI's will.

Giving out mousepad? In these days? Wow. Just.. wow.

On topic, that's interesting news; the cables I mean. The colourful Kotoris, on the other hand... that's OT but something that I am very interested in.
post #10182 of 10873
Quote:
Originally Posted by jgray91 View Post


Giving out mousepad? In these days? Wow. Just.. wow.

On topic, that's interesting news; the cables I mean. The colourful Kotoris, on the other hand... that's OT but something that I am very interested in.

The mousepad has a semi-transparent center, with a picture there. The thing is that you can remove the picture and put your own photo's...

I personally love it. Plus it says FOSTEX on the edge. I'm sure you can see it on my FB, at the end of the Headphone Festival album.

 

And yes, hoping the cables will be available! I might splurge and buy myself a pair of those headphones if the price is right... otherwise at least the cables if it is available.

post #10183 of 10873

Just finished wiring and testing a set for my little brother. I converted it to dual entry removable 3.5mm plugs. I will be getting in Shure 840 pads and Alpha Pads shortly, at which time I plan to fill in all the holes currently covered with electrical tape and then sand/paint the entire headphone. Also waiting on a luggage strap to attach a comfort headband Paradox-style. 

 

==

 

 

 

post #10184 of 10873

So this may have been answered somewhere in these 679 pages of thread.. but has anyone mentioned a good alternative dampener that costs less than dynamat, ect?

post #10185 of 10873

trying to search through all these replies. 

 

Just ordered the T50RP's of eBay now I need the parts to mod. 


Anyone know the best sources to get the stuff needed? 

seems like  a waste to buy large amounts when only small amounts are needed to mod (i.e. dynamat)

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