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

Orthodynamic Roundup - Page 434

post #6496 of 23373

Q for ludoo

Ludoo, I was using your very cool Head-Fi Megathreads tool and have a question for you. Is there a way to just display a gallery of pictures? Searching does not always work on pics so just browsing them would help if one is looking for specific pic.
post #6497 of 23373
Wow, 5 T-30s in 2 days, crazy! I didnt win the obvious one, stopped around $102, and didnt even see the lot Eric won (obviously). Seems that having a couple weeks off work is hurting my ortho searching, since I have so much less bandwidth at home (satellite). Ah well, at least there are still deals to be had. Congrats Eric.

On an unrelated note, great job with all the SFI woodies popping up.
post #6498 of 23373
Quote:
Originally Posted by Faust2D View Post
Ludoo, I was using your very cool Head-Fi Megathreads tool and have a question for you. Is there a way to just display a gallery of pictures? Searching does not always work on pics so just browsing them would help if one is looking for specific pic.
Pics show up only if there are some in the posts that match the search terms. I can definitely add a browsing feature, indexed/filtered by date/author. Start pestering me if it does not show up in a couple of days, as I'm a bit forgetful lately.
post #6499 of 23373
Modding has so far gone well with the HOK-80. I've sealed it up with foam gaskets instead of blutak. Less messy. I removed the hard black discs, and instead I put paper tape over the inside of the grilles, as well as a thin felt disc. Bass is still, as expected, about at the same level as before. Maybe less, maybe more. Not a huge difference anyway. But there is an almost silent hum that goes down a bit further that I'd like to bring out.

Now, I've got to come up with something for pads. Make new, or buy something...
post #6500 of 23373
Quote:
Originally Posted by ludoo View Post
Pics show up only if there are some in the posts that match the search terms. I can definitely add a browsing feature, indexed/filtered by date/author. Start pestering me if it does not show up in a couple of days, as I'm a bit forgetful lately.
Browsing feature would be supper helpful. Thanks!
post #6501 of 23373

HOK-80 pictures of drivers and mod

Speaking of images, in case someone did not see the HOK-80-2 pictures posted earlier by other owners, here are some new ones. As you probably all have seen earlier, it has exactly the same hole pattern as in the pictures of the Burwen 6, that were posted a lot earlier in this thread by Kirk. ( http://www.head-fi.org/forums/f4/ort...3/index22.html )
But judging from the reflection in those fuzzy photos, it's not the same voice coil in between.






Ericj's way of tacking everything togehter for assembly. The foam gasket is visible in the perimeter. There is one under the driver as well. If I take it apart, I will have to make a new foam gasket since I will have to destroy it. Foam is cheap, so it doesn't matter really.


Tape on the inside of the grilles.

It really was easy to close the cups with the method ericj described.
post #6502 of 23373

Grundig GDHS224 mod goes on...

Quote:
Originally Posted by wualta View Post
No need for that, unless you were going out anyway. You could just use a piece of sticky tape.

As long as you're out, could you bring me back a bag of Tim Tams? Thanks.
I've put three pieces of sticky tape on the driver, and a reflex disc half the diameter of the driver behind the thin felt. Now, I'm going to hear if it made any difference. (They don't sell Tim Tams here. Otherwise, I'd bring you a bag of it.)

Quote:
Originally Posted by smeggy View Post
DAC, I don't think there is one true way. Both work. I just re-jigged my T40 pad setup on a niggling doubt and wham! More, deeper, better bass using the trusty old weatherstrip. Thick stuff this time. It really is great stuff. I previously had another earpad inside but the thick strip works even better.

That's great... Either I use thin pads to get more bass, or thicker ones... I just have to avoid medium pads then. And I have to find some of that weatherstrip stuff.
post #6503 of 23373
That weatherstrip stuff looks like the puck put on a stock T40, and probably has the same effect sound-wise (except better). Does it make the wooden T40 less efficient? As in, does it bring up the bass by decreasing the treble? I think that's what I need in my T40, if that's what it does.
post #6504 of 23373
Just purchased a set of ATH-70's off a fellow Head Fi'er. There is little to no information on them I can find. Seems like a good candidate for some modding. Any suggestions from the Ortho crowd?

BTW stock they sound good. A little light in bass.
post #6505 of 23373
They're electrets, not orthos. I'm not sure how modifiable they are. There was a thread recently on the ATH-9000 that talked about other AT electrets. I think the ATH-70 was mentioned. You can also search for Signet TK33 or TK44. They were rebadged ATs. I think the ATH-9000 thread mentioned what they were the equivalent of. I think it's also in Faust2D's wiki.
post #6506 of 23373
It's a bit of distancing the mid/treble and focusing the bass with a very good seal. I normally make them so the inner hole is just big enough to slip over my little finger tip. The weatherstrip is almost like a dense memory foam and once warm conforms to your ears very well. It's not springy, compresses well and It makes an exceptional pad but is somewhat fragile by nature being foam. However, it is cheap, easy to make and replace. Sonically better than most pads I've come across, if not all.

Quote:
Originally Posted by mypasswordis View Post
That weatherstrip stuff looks like the puck put on a stock T40, and probably has the same effect sound-wise (except better). Does it make the wooden T40 less efficient? As in, does it bring up the bass by decreasing the treble? I think that's what I need in my T40, if that's what it does.
post #6507 of 23373
Cool, that sounds great, smeggy. Looks like I'm not finished with the T40 just yet... It's so close to becoming truly good I can taste it. Or hear it, rather. Or something.
post #6508 of 23373
Thread Starter 
First, congrats to Eric on the T30 deal of the decade. Lay your traps for the seller who buries the good stuff in the text of his auction, who misspells things because he's in a hurry. The best deals are always hidden.. by accident... and patience pays off. It's the ninjiujitsu way.

The seller told me the T30s were all in good shape, though they won't be in their fancy Fostex vinyl cases (big deal!).

Studying the T50RPv2 has taught me (and reminded me of) something else about earpads: Even if they're airtight, they have to have enough of what the acoustics boys call "surface density". In other words, they've got to have some heft, some mass. The original T50RP had no bass because of the small size of the driver, true, but it also had no bass because the earpads were light, as if they were filled with cotton candy. Artificial sweetener cotton candy. Bass just passes through them the way it passes through the limp dust covers of an electrostat.

The new earpads, though not that much thinner, are more like slabs of meat. You can press the T50RP to your head, collapsing the original pads to thinner than the new ones, and you still won't hear bass like the new pads deliver. So do what Smeggy's doing-- whatever you choose for earpads, make them as dense as you can. Sometimes this will be practical, sometimes not. Thin and fluffy will be better than thick and fluffy, but thin and the consistency of veal would be ideal.

You can begin to see why Koss originally used mineral-oil-filled earpads for the ESP/9. And the Pro 4AA, for that matter. Even my Sharpe 660s used oil-filled pads for the single purpose of blocking out all ambient sound (they certainly had no bass to speak of).

Smeggy's supracircumpads work because both pads seal to your ear and/or head. The original T40's foam rings didn't make it all the way to make a seal, though they touched your ears, and the result was simply a messed-up midrange. Now, do Smeggy's weatherstrip rings do a subtle number on the T40's midrange too? It's likely they have some effect. Could be good. Depends. You'll have to try it for yourselves. Kinda makes you wish manufacturers would make adjustable earpads, doesn't it. Then you could trade off bass for midrange smoothness, because any time you have a sealed cavity, cavity resonances show up.

In a way, the ideal earpad would be one built up from discs of soft leather. DAC, take note. I'd love to see you get some real bass from the HOK. The original earpads were thin leatherette. See what you can do with some thick-walled earpads. That's the stuff you need.

The original T50RP really did sound lousy, honest.

The ATH series of electret 'phones by A-T were notable for being very midrangey. A different stargety is called for. If you cover the cups with your hands while they're playing you may hear something you like. Absorb, reflect. Let us know what you find.

Great stuff, guys. Keep it coming.
post #6509 of 23373
Mine sound pretty awesome now. I know I say that about all my cans but it's true The efficiency isn't too bad either as I was using mine for a couple of hours today while out and about on errands playing from my DAP. I also got a nice comment on them from some lady passing by.
post #6510 of 23373
Quote:
Originally Posted by wualta View Post
Kinda makes you wish manufacturers would make adjustable earpads, doesn't it. Then you could trade off bass for midrange smoothness, because any time you have a sealed cavity, cavity resonances show up.

Didn't Rotel ship one of their (toshiba/aurex) back-electret cans with both circum & supra pads?
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