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Orthodynamic Roundup - Page 75

post #1111 of 21675
9/16/07 at 7:18pm
Quote:
Originally Posted by AudioCats View Post
Thanks ericj.

now if the magnet is 56mm, does it mean it is effectivly about the same size as the Yh-1 and YH-100? the YH's are 55mm but the magnet is the same diameter as the whole driver.
'effective size' would be the diameter of the openings in the driver, but it's unclear how useful this measurement might be.

Keep in mind that these fosterexen are "dome" type drivers where the yamahas are "pinch" type drivers.

Quote:
Do you know the weight (if you can measure it)? I supposed you got them from that Sansui place, any more of them still available?
I'll measure them tonight, and yeah, I got 'em from Sten. You'd have to ask him if he has any more available.

fwiw the only difference between the 'left' and 'right' drivers is an extra set of pads on the 'left' one for connecting the main cable to the cable that goes through the headband - since th SS-100 was a single-entry design.
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post #1112 of 21675
9/16/07 at 7:41pm
Thread Starter 
Quote:
Originally Posted by AudioCats
*YH-100 housing with high density foam pads:
smooth highs and mids, strong and clean bass, great clarity. The sound is super sweet (syrupy) to my ears. Don't have that electrostatic feel anymore.
This is a puzzle. The sound is the best overall but it's "syrupy" and non-stattish? Somethin' ain't right.

Quote:
Originally Posted by AudioCats
*YH-100 housing with white filter fiber (fish filter?):
Super strong, yet clean bass. highs and mids good. Sound more like a dynamic, but still smooth.
Is this the polyester "wool" such that you'd find stuffed in an aquarium filter? Did you stuff it into the YH-100 cup nice and tight?

Did you try this stuff in the QP housing?

Quote:
Originally Posted by AudioCats
*In QP45x housing: no satisfying results so far. It can be tuned to sound better than in a 55x housing, but still not as nice as in the stock Yamaha housing, at least not to my ears. I suspect swt's donuts have smaller cavity than the QP's.
It'd be interesting to compare the SecretFoam YH-100 to the Donut YH-100. Hope that's a possibility.

Quote:
Originally Posted by AudioCats
There is only about 1/8" space in the Yh-100 housing, so it appeared that stuffing the space with a 1/8" thick high density foam disc worked really well. The best so far, great bass and smooth highs and mids. great clarity. Very sweet (literally) sound.
I've never had good luck with just foam in the YH-100, but if it works, it works. We really should A/B the two approaches some day.

Quote:
Originally Posted by AudioCats
If the Yh-100 goes into a large housing to make super bass monsters, a reflex dot might be needed. But not in the stock housing.
I'll just point out that if you have a flat nonabsorbent object behind the driver you already have a reflex disc/dot. Even felt has this effect somewhat.


Quote:
Originally Posted by AudioCats
We didn't have any success with felt, either the black stuff Alex had or the grey scarf fleece I got, as damping pads on the YH-100 driver. Black felt did clean up the bass somewhat, but not to a point that we'd call it good enough. Could be the wrong density.
It could. Cheap felt by itself has never been enough for the YH-100, although it has been a big improvement that pointed the way to further mods. If the bass was still sloppy after one felt disc then I'd say something extra was required to press the felt tightly against the driver. Or it could be really, really cheap felt.

Quote:
Originally Posted by AudioCats
hehe, lets keep it that way, until I get something with LARGE ortho drivers, like YH-1 or maybe some SS-100 driver. I think this foam is kind of a universal shotgun fix for ortho tuning, so once the secret is out the ortho price might go even higher.
Remember, the YH-1 is the same size as the HP-1 and YH-100.

Since different ortho/iso drivers are tuned differently (for different enclosures or just because), the SecretFoam that works for one may not work for the others. In my [nonSecret] experience, the YH-100 requires more damping/tuning than any other ortho/iso except the Fostex T20v2.


Quote:
Originally Posted by AudioCats
...the 990 bass was VERY sloppy comparing to the tuned Yamaha..
Glad to have confirmation of this. It's been my opinion that a properly-damped YH-100 can have bass that's both ultra-tight and deep, enough to give the typical $300 dynamic a run for its money.

.
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post #1113 of 21675
9/16/07 at 7:55pm
Quote:
...only problem is the syrupy sweet sound. It even smooths out songs that should sound gritty, which can be a bit awkward sounding.
I guess sweet is not always good just like my iGrado with 24ga teflon silver recable, sweet for everything, everything........everybody sings with joy, and only joy. No saddness, no blues, no anger
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post #1114 of 21675
9/16/07 at 8:01pm
Quote:
Originally Posted by AudioCats View Post
I guess sweet is not always good just like my iGrado with 24ga teflon silver recable, sweet for everything, everything........everybody sings with joy, and only joy. No saddness, no blues, no anger
hahaha, well it doesn't really sound happy. It's just lost a bit of that gritty feel to it. I'm probably thinking of shimming down the pieces even further and getting some of the filter fiber. Switching housings lessened a bit of the sweetness and replaced it with airiness. I'm really thinking a reflex disk made from the secret foam with filter fiber stuffing would be the perfect combo.
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post #1115 of 21675
9/16/07 at 8:28pm
Thread Starter 
Quote:
Originally Posted by ericj View Post
As i've pointed out before, we can buy long skinny neodymium stick magnets from United Nuclear - but Bob Lazar sure charges a lot for them.

Why does a web store that sells such cool stuff have to be owned and operated by such a space cadet?!

One of these days I'm gonna find a cheaper source, and then maybe I'll try and build my own drivers - or at least my own magnet sets.
How about these guys?
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post #1116 of 21675
9/16/07 at 8:29pm
Quote:
Is this the polyester "wool" such that you'd find stuffed in an aquarium filter? Did you stuff it into the YH-100 cup nice and tight?

Did you try this stuff in the QP housing?
they are similar. It is the filter I removed from inside a PUR ultima pitch filter. The fiber was about 5mm uncmpressed, I guess inside the Yamaha housing it is compresed a bit. We only have a 60mm x 10mm thickness pad, it wasn't enough to fill the QP housing (the thickness was right, but not big enough in dia). That undersized pad in QP housing didn't sound good.--------edit: the filter fiber is actually Not the same as what Wualta refered to as "fish foam".

Quote:
This is a puzzle. The sound is the best overall but it's "syrupy" and non-stattish? Somethin' ain't right.
True. But that was the best sounding combo we got at that point. The only time I sense that ESP feel was with Footemp's black felt pad. But the bass was bad then, worse than my 990's. Maybe filter fiber with a reflex dot can give good result too, but we didn't try that combo.


Now the 990's bass is not always sloppy. It was sloppy when playing that rap song. In other songs the bass is nice. The tuned YH-100 on the other hand, had strong and clean bass in every song.

The HP foam works both as damping and reflector. 2~3mm thickness gave good results in the stock YH-100 housing, also my SFI in Sony housing. 1/4" thickness kills treble and bass, empasize the mids, so thickness is the key. I am not saying other combination damping won't work better, I just thought the HP foam can guarrantee good results. Whether that will the optimal result is something else.
Unsurprisingly, there is no way the SFI can reach the kind of bass of the YH-100
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post #1117 of 21675
9/16/07 at 8:57pm
hey all, looks like Duggeh just won a pair of PMB100 for a riduculously low sum, helped by the fact that the unresponsive seller had blocked all non-Europe bidders. (shoot, why did I switch my ebay registration back to the US!) On the other hand, knowing Duggeh, they'll be back on the market after he's satisfied his curiosity. I'm sure we'll be hearing from him.
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post #1118 of 21675
9/16/07 at 10:26pm
Quote:
Originally Posted by AudioCats View Post
they are similar. It is the filter I removed from inside a PUR ultima pitch filter. The fiber was about 5mm uncmpressed, I guess inside the Yamaha housing it is compresed a bit. We only have a 60mm x 10mm thickness pad, it wasn't enough to fill the QP housing (the thickness was right, but not big enough in dia). That undersized pad in QP housing didn't sound good.


True. But that was the best sounding combo we got at that point. The only time I sense that ESP feel was with Footemp's black felt pad. But the bass was bad then, worse than my 990's. Maybe filter fiber with a reflex dot can give good result too, but we didn't try that combo.


Now the 990's bass is not always sloppy. It was sloppy when playing that rap song. In other songs the bass is nice. The tuned YH-100 on the other hand, had strong and clean bass in every song.

The high density foam works both as damping and reflector. 2~3mm thickness gave good results in the stock YH-100 housing, also my SFI in Sony housing. 1/4" thickness kills treble and bass, empasize the mids, so thickness is the key. I am not saying other combination damping won't work better, I just thought the high density foam can guarrantee good results. Whether that will the optimal result is something else.
Unsurprisingly, there is no way the SFI can reach the kind of bass of the YH-100
Yeah, we based our conclusions off of a sample from a De La Soul album because I was pretty confident that the bass hits and bass line was pretty hard to play clean. The YH-100s are one of the few headphones I've heard that it sounds nice and clean on. I'm pretty confident about the stat feel and sound from what Audiocats has described, and the sound of the secret foam is different from the sound of the felt for sure. The best solution is probably a large filter disc along with a reflex disc/dot. I also have some cotton copper that I bought off Audiocats so I will recable and report once I get nicer plugs, some more shrink wrap, and techflex that isn't red.

Just to make sure this wasn't overlooked:
The beefing up of the baffle really helped the bass problems I had on my 55x. Now it rivals the 45x we were working with using the right pads. Also, I feel that the thinner secret foam piece really works better than the thickness we used initially. (The initial thickness was double the one I am using now.) Since I left the stock foam in as filler, it helps suspend the foam away from the driver slightly. It acts like a semi-reflective damping system, I think. The secret foam really tightens everything up and behaves somewhat like a reflex disc in some senses.
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post #1119 of 21675
9/17/07 at 12:52am
Quote:
Originally Posted by facelvega View Post
hey all, looks like Duggeh just won a pair of PMB100 for a riduculously low sum, helped by the fact that the unresponsive seller had blocked all non-Europe bidders. (shoot, why did I switch my ebay registration back to the US!) On the other hand, knowing Duggeh, they'll be back on the market after he's satisfied his curiosity. I'm sure we'll be hearing from him.
Actually, our esteemed Master of Ceremonies bid for me by proxy.

The PMB-100 will be going to Duggeh for a week or two for him to enjoy before he forwards them on to me.

The crazy part is, the seller initially told me he would ship to the US, and he accepts paypal and everything.
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post #1120 of 21675
9/17/07 at 1:00am
Quote:
Originally Posted by wualta View Post
How about these guys?
We might be able to build some sort of honeycomb with some of those, but nothing on that site compares to these beauties:

http://www.unitednuclear.com/sticksm.jpg

5/16" Wide x 1/8" Thick x 3" Long

Only $6/ea. For twice as much you can get 'em twice as long.

They're polarized so that the long, skinny sides are the poles. Going over some of the isodynamic patents, this gives us a number of possibilities.

I'm thinking here of the possibilities of some sort of uber-wharfedale design.
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post #1121 of 21675
9/17/07 at 1:02am
Thread Starter 
Quote:
Originally Posted by ericj
The PMB-100 will be going to Duggeh for a week or two for him to enjoy before he forwards them on to me.
Yay! Weirdophones for America!

Have you been able to get the seller to determine whether they're the Mk 1 or Mk 2 version? Naaah, that'd be.. like... crazy.

Quote:
Originally Posted by ericj
The crazy part is, the seller initially told me he would ship to the US, and he accepts paypal and everything.
And then he blocked you from bidding, so you called in the Irresistible Force?

Crazy!
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post #1122 of 21675
9/17/07 at 1:14am
Quote:
Originally Posted by wualta View Post
Yay! Weirdophones for America!

Have you been able to get the seller to determine whether they're the Mk 1 or Mk 2 version? Naaah, that'd be.. like... crazy.
Heck, I couldn't get him to respond to email after the initial response about trans-atlantic shipping.

Quote:
And then he blocked you from bidding, so you called in the Irresistible Force?

Crazy!
Yeah, it was a last minute act of desperation. Well, last 12 hours anyway.

I'm gonna have to raise will prescutti again and see about MBFloat earpads again. And this time ask him how i actually go about paying him to ship me some.
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post #1123 of 21675
9/17/07 at 1:16am
So now you will have a 2 uglyphones. Congratulations!
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post #1124 of 21675
9/17/07 at 1:19am
Thread Starter 
And speaking of strange 'phones, have any Elektronika, Amfiton or Echo 'phones shown up in the NYC area lately?
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post #1125 of 21675
9/17/07 at 1:22am
Quote:
Originally Posted by Faust2D View Post
So now you will have a 2 uglyphones. Congratulations!

I really like the QP85 for movies & tv shows with extensively mixed ambient sound.

House MD, for example. But don't watch the reruns on cable w/ floats - they snip every frame they can to squeeze in a couple more commercials, and the continual tempo changes are nauseating.

I'm curuious how the isodynamic version compares - especially since i'm getting it cheaper than the dynamic version.
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