Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › Orthodynamic Roundup
New Posts  All Forums:Forum Nav:

Orthodynamic Roundup - Page 422

post #6316 of 23450
The old padding is replaced with my fumbly attempt at damping. At least now I can hear the low-bass-drum. It's just not as deep and rumbly as through the HD580. (could be wishful thinking... can't A/B this... but as I recall, it was the absence of the drum that made me think about this at first)
post #6317 of 23450
Quote:
Originally Posted by DefectiveAudioComponent View Post
The old padding is replaced with my fumbly attempt at damping. At least now I can hear the low-bass-drum. It's just not as deep and rumbly as through the HD580. (could be wishful thinking... can't A/B this... but as I recall, it was the absence of the drum that made me think about this at first)
Then you need to damp them, maybe more than they are damped now. If the bass tightens up and deep bass surfaces, they were (possibly still are) severely underdamped. How is treble? Speed?
post #6318 of 23450
Quote:
Originally Posted by ludoo View Post
Then you need to damp them, maybe more than they are damped now. If the bass tightens up and deep bass surfaces, they were (possibly still are) severely underdamped. How is treble? Speed?
Deep bass has improved, no doubt. When I hold the Grundig a bit away from my ear, it sounds exactly as it did before the new damping I put in place. Bass gets somewhat better again if I press the pads against my ears but I fear that I will get some disease from these old pads if I do that too much. Still, not like the HD580, as I wrote. (the match gets a tad more even if I connect the HD580 to the bass-light 0404 usb and the Grundig to the XCAN, but they are not quite on even footing, the bass still appears to be at a lower volume compared to the rest of the music. Also, there might still be depth missing.)

My damping attempt now consists of four layers. Farthest out is the black transparent but wind-proof tape that was there to begin with, covering the grilles. Then a layer of very thin felt. Then a thin layer of wool. Then thin felt, and then another larger thin felt so that I don't get wool in the driver. (I also bought a very thin sheet of foam plastic to use if I need to seal off the grilles completely. I planned to use it for the HOK-80 that is on its way.)

For speed I'm not sure that the HD580 is a good reference. Is it? What should I listen for? I'm listening to Aces High by Children of Bodom, with a fast drum track, guitar, and vocals. Suitable? The fast drums are distinct, but I am not sure if they ought to be distincter...

(My experimentation is slowed down by music that suddenly sounds great. Some music in my collection has better synergy with the Grundig than with the HD580, it appears.)
post #6319 of 23450
Thread Starter 
Quote:
Originally Posted by DefectiveAudioComponent View Post
Even with crumbling damping and destroyed pads, if the planar sound is in general similar to this, then I do not understand why almost all producers quit making this kind of driver (perhaps that's what this thread is all about really?).
You are correct. That's what this thread is all about really.



Even though it has a center electrode, the 224 driver looks to me to have the classic spiral voice coil on a flat diaphragm arrangement, somewhat reminiscent of the Russian TDS-16's driver but not the same, more like the PMB driver but not typical of that either. Good closeup, by the way.

This may turn out to be yet another diaphragm configuration: flat/smooth and lightly tensioned with a center electrode. With that, we're up to 4, if you count the Wharfedale.

Hope someone here got the Fostex T10 that went earlier this evening and included a brochure.
post #6320 of 23450
Quote:
Originally Posted by wualta View Post
Hope someone here got the Fostex T10 that went earlier this evening and included a brochure.
Not me, $1 shy.
post #6321 of 23450
Quote:
Originally Posted by cetoole View Post
Not me, $1 shy.
I was in front of the computer but totally forgot about it.
post #6322 of 23450
Quote:
Originally Posted by ludoo View Post
I was in front of the computer but totally forgot about it.
Speaking of that, did someone here get the Grundig 223 that was sold for about 17 euros? I forgot to bid on it when I had just got the 224...
post #6323 of 23450
Quote:
Originally Posted by ludoo View Post
I was in front of the computer but totally forgot about it.
Why I snipe every single auction buddy.
post #6324 of 23450
You people have might already have talked about it, but did panasonic ship a tiny ortho with their '81 walkman?
There are no clear facts about it, except that what I see on the picture inside the cups of those small headphones makes me really curious.


http://telefunken.te.funpic.de/panas...anasonic56.jpg
post #6325 of 23450
I'm lookig at my wallet, and it is made of the leather I need to repair my Grundig ear pads...
post #6326 of 23450
Quote:
Originally Posted by DefectiveAudioComponent View Post
I'm lookig at my wallet, and it is made of the leather I need to repair my Grundig ear pads...
Easy: finish emptying it buying old phones and amps, then use it for pads.
post #6327 of 23450
I'm gonna break the auction rule again, to show you a Charity Ortho: RARE Vintage Bang & Olufsen U70 Headphones B&O - B50 on eBay, also Bang Olufsen B O, Systems, Home Audio Hi Fi, Consumer Electronics (end time 28-Dec-08 21:30:00 GMT)
B&O U70 Ortho, all proceeds to the British Heart Foundation.
post #6328 of 23450
Quote:
Originally Posted by wualta View Post
UPDATE: Adding earpads to the U70 gives a surprising, disappointing result: the pads keep the backwave away and increase effective bass output, but the whole upper octave seems missing! It goes out flat, then seems, subjectively, to drop like a rock. For a panicky moment I though I'd gone partially deaf, as little twiddles on tambourines and other tinkly details were wiped out of certain test songs, but it turns out to be due to some failing of the U70's drivers.
What test songs were those? I'd like to hear whether the Grundig drivers have the same problem when I get the pads repaired / replaced. (At this point, I assume that my HD580 will reveal the deails so that I have a reference to use...)
post #6329 of 23450

Fostex parts

Quote:
Originally Posted by wualta View Post
We've been having trouble getting Fostex to sell any parts online. But try a local dealer and lean on them until they cough up some earpads. Then work your way up to driver/baffle assemblies.
Fostex wants 70 euros for one new T50 driver + tax and 10 euros for one ear pad + tax. Nice deal? Not.
post #6330 of 23450

Fostex Pads - Fosteheru padu Nippon express

Ok. I have an interesting development re T20 and T50 pads. I can get them from Japan. The price at the current exchange rate (88.5¥ for 1$) comes out to $20 for T20v2 pads and $25 for T50RP pads. On top of that there is a flat $10 fee and shipping in Japan (~$9) and from Japan to NYC (~$8 via slow as sh$t SAL).

Anyone wants to order them with me in a bulk order to spread the cost of shipping and $10 fee? I was thinking I will need one T20 and one T50 set.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphones (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › Orthodynamic Roundup