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Feb 13, 2008 at 7:32 PM Post #1,771 of 27,310
Another way of damping fostex t-50rp (it is better):
1)
7a8e93809f59.jpg

2)
a01e3936cc3b.jpg

3)
a0b64f9b8579.jpg
 
Feb 13, 2008 at 8:26 PM Post #1,772 of 27,310
Quote:

Originally Posted by wualta /img/forum/go_quote.gif
Let me clarify my statement a little. Notice I didn't say that the TDS-5M sounded like the YH-100, but rather that it's more like the YH-100 than like the YH-1. There is a rather large difference in the bass between the YH-1 and YH-100, but outside of that they do sound very much alike, since they're both Yamaha 55mm drivers in very similar enclosures. The TDS-5M has bass that's somewhat like the YH-100's, but overall, a sonic signature of its own.

Cool photo of the piezo! Who's the manufacturer?

Some have said that the TDS-7 is a very uncomfortable headphone. Anyone have any experience with it? Just in case one turns up?

.


They are made on a closed military factory. No brand name.
 
Feb 14, 2008 at 1:29 AM Post #1,773 of 27,310
Quote:

Originally Posted by PDOT /img/forum/go_quote.gif
Another way of damping fostex t-50rp (it is better)


Fascinating. I never would've guessed the T50RP's response curve would flatten out like that. I'll have to try it myself.
 
Feb 14, 2008 at 1:38 AM Post #1,775 of 27,310
Quote:

Originally Posted by wualta /img/forum/go_quote.gif
Fascinating. I never would've guessed the T50RP's response curve would flatten out like that. I'll have to try it myself.


I can scarcely credit it. Imagine if after all this we all come around to buying RP series Fostexen.
 
Feb 14, 2008 at 1:51 AM Post #1,776 of 27,310
while we're on the subject, i'd just like to remind folks getting out their wallets that according to the Fostex parts store (which is offline at the moment) - the $60 T20RP uses the same driver module (and earpads) as the $75 T50RP.

We know that the cups are the same shape and size, so this means damping and venting are the only possible differences.

wualta, you say the T50RP has the top vent blocked?

Chances are that the T20RP has both vents open like it does in T20v2?
 
Feb 14, 2008 at 2:50 AM Post #1,777 of 27,310
Quote:

Originally Posted by ericj /img/forum/go_quote.gif
while we're on the subject, i'd just like to remind folks getting out their wallets that according to the Fostex parts store (which is offline at the moment) - the $60 T20RP uses the same driver module (and earpads) as the $75 T50RP.

We know that the cups are the same shape and size, so this means damping and venting are the only possible differences.

wualta, you say the T50RP has the top vent blocked?

Chances are that the T20RP has both vents open like it does in T20v2?


Are you sure about that? T50 has max Input 3000 mW and T20 has max Input 2000 mW. Could this be just due to vents?
 
Feb 14, 2008 at 4:45 AM Post #1,778 of 27,310
Quote:

Originally Posted by Faust2D /img/forum/go_quote.gif
Are you sure about that? T50 has max Input 3000 mW and T20 has max Input 2000 mW. Could this be just due to vents?


That's a real good question.

Someone should go to the Fostex support forum and ask for an explanation.

The replacement part is here:

LiteCommerce online store builder - SPEAKER,T50RP,T20MKII

The support forum is here:

Fostex Forums - All Other Fostex Products and Accessories

Edit: I decided to go ahead and ask:

http://www.fostexusa.com/mercuryboar...a=topic&t=4125
 
Feb 14, 2008 at 5:18 AM Post #1,779 of 27,310
Quote:

Originally Posted by FacelVega
I can scarcely credit it. Imagine if after all this we all come around to buying RP series Fostexen.


Yeah, like FV I'm having a very hard time wrapping (warping?) my head around the possibility. [UPDATE: But this is pretty much what's happened, as of early 2011!  In early 2008 we simply hadn't yet discovered that it was the early-production stock earpads that were doing the bass a great disservice] Of course, note well that PDOT says there's a loss of bass, though it does put in an appearance in his graph.

Well, bass (and some lower midrange) is what I chiefly find lacking in the T50RP [see above]. The rest of the spectrum is pretty good, though not to my tastes. I'm still going to give his mods a try, though right now I can't say when.

I still think that to make this little driver perform, it'll have to be sawn out and transplanted [do that search for <thunderpants> now] into something very close to a classic planar headset (Stax SR-30, Realistic Pro 30, etc). No way will it give adequate bass with the existing circumaural earpads. [true! with emphasis on existing]

As for the vents, I wish I could confirm that for you, but my T50RP is in storage at my son's house. I'll retrieve it and let you know for sure.
 
Feb 14, 2008 at 6:41 AM Post #1,780 of 27,310
Sorry to throw you guys OT a bit, but check out this patent I found. I especially like Figure 2.
biggrin.gif


Bass reflex-type headphone - Google Patents

This definitely enforces my confidence in a "bass reflex-type" headphone design. Can't wait to finish construction on my pair.
 
Feb 14, 2008 at 11:01 AM Post #1,781 of 27,310
Mainly, there is only mid-bass in fostex t-50rp and little of lower-bass. It’s middle is good after modding. I have no any claims to it. As for highs, they are detailed enough after this mod (but not «hi-end», of course). In general, the main problem of fostex t-50rp(without modding) is it’s professional sound. It sounds not very detail and frequency respond is made as if they were made for correcting mixes (for example) in studio but not for listening to the music. The same is Akg 240Monitor. With a help of the modding we can make it closer to the «audiophile quality sound». Fostex T-50rp becomes more detail and flat. I think, fostex t-50rp could sound even better than тдс5 or 15 if we properly work at it. Good luck!

ericj,
That felt is about 4mm. It is from ТДС 15. I just use it here.
 
Feb 14, 2008 at 3:57 PM Post #1,783 of 27,310
PDOT, I completely agree with your assessment of the T50RP's sound and the reasons for it. In fact, I've been saying the same things about it and the T20RPmkII and T40RPmkII and even the T20v2 and T40v1 in their unmodified state. Fostex basically took the T20RPmkII cup design and dropped in a tiny driver wholly unsuited to it-- if looked at from an audiophile point of view.

I think it will take a nontrivial amount of work to make it sound as good as it is able.

I'm intrigued by your comparison of the modified T50RP with the TDS-15. Does the TDS-15 also lack low bass?
 
Feb 14, 2008 at 5:54 PM Post #1,784 of 27,310
Just got my second pair of ATH-2's and they (were) still stock and holey smokes did they sound bad. Now I don't feel so bad for Eric calling these crap because, well honestly, they were.
 
Feb 14, 2008 at 6:56 PM Post #1,785 of 27,310
Quote:

Originally Posted by khbaur330162 /img/forum/go_quote.gif
Just got my second pair of ATH-2's and they (were) still stock and holey smokes did they sound bad. Now I don't feel so bad for Eric calling these crap because, well honestly, they were.



Yeah. There's something right about them, but it's overpowered by all the things wrong with them.
 
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