Orthodynamic Roundup - Page 1379

Looks like Trend Tex , but I don't see it listed on their product page ..dB

 I just went in and completely reworked the guttards of that last alder build, even put my back out doing it so final tuning is gooned on muscle relaxants, so it's bound to be good, though I am not a fan of that sort of thing.

Got the final tuned to sound like it's external to me, like speakers due to using some special acoustic filler, one side for some reason took half the amount. But it lacked just a hair of detailing so i upped the acoustic filler down gradually on both sides until I was in between maintaining the external type sound and hitting some resonances.

Sounds easy but I would honestly say it was about 30 or more trials. The old seesaw effect again.

In the end ( now ) settled on the 2 discs of the A. Cotton, with the additional fluffy acoustic filler at disturbingly different rates per side due to wiring interference possibly?

One damping layer/disc wasn't bad (not good enough ), 3 pulled in too many details and highs it was seriously almost like a friggin estat, not something  my pal would want I am guessing. So many subtleties it was distracting and surreal.

I had to devise a way of making sure the driver edges were sealed off so i used some 2 inch wide electrical tape with a driver sized opening to seal it up each time.

Now to replace the black double sided baffle-to-cup joint tape, re-solder one driver's wires to be sure, screw the baffle down, and re-contact cement the pads.

As for the question about the Pro30 damping that is being reworked. Too many details, and this thing is missing the driver paper damping even. I'll let you know when I figure that one out, too  much for one night .

Bearing in mind this is simply my own experience , ( and a few others i sent some to may chime in )and particular wrangled results on a case by case basis. Effects seem similar.

The stuff is a product of ( damn can't find the label I had ) I  will check the label next time I go to the store

Think it is a Canadian thing.

I dunno I feel like not posting things like this sometimes until i have a huge handle on it but can't hurt to talk out loud maybe something will trigger something for someone somewhere somehow sometime

Quote:

Originally Posted by bruma 

a small contribution to the HP-1 HP50 discussion:

I changed the damping layout of the HP-1 again within a very short time:

I liked your previous damping idea, wha was so wrong about it? One thing you could try is sanding off the foam from the "acoustic barrier" and use the latter only. That does wonders IME, mostly because that foam was meant to attenuate the whine of computers fans....not quite what we need.

Quote:

Originally Posted by kalbee 

Ugh, leeperry, everytime you talk your praises about your YH-1's the chances of my YH-1 surviving as stock goes down
I don't want to rip that pleather earpad while opening them up!!!
Only curious on whats this magic you're talking about since my aniso HP-1 are more than fine to my ears. Though I did get very lucky with whatever material I used initially as replacement for the felt wualta mentioned.
My HP-3 is pretty bass heavy (to my ears/tastes) with very early roll off in anything high frequencies.
I'll try modding these soon... once I get a hang on how to easily remove the baffle. Last time it took me over 5 minutes.
Per side...
Don't want to risk breaking the plastics on it, since my HP-2 driver's foster home is having those kind of problems...
Meanwhile still working on removing the drivers in another dynamic. I'll get it eventually...

Well, the YH1 off the DP1 puts a big grin on my face when listening to movies or 70's music, that's all I know 

The only thing that can break in the YH1 IME is the screws threads so don't overtighten them and you're good to go.

I like Nick's arctic bamboo stuff esp. for headphones that don't need too much damping. Its also an excellent material for lining the cups.

I won't stuff multiple layers of it though since I thought the side effects started creeping in without little added advantage. One would be better off mixing & matching different materials.

Quote:

Originally Posted by ferrytrainhp1 

I have a pair of HP 1 s which I really love and I think that the HP 3 would be a great portable headphone.

I have the HP3 and use it sometimes as a portable headphone, but I find the headband is not tight enough and even nodding my head down slightly can be enough to send it flying off my head.

Either my particular headphone has been stretched over the years, or the headband is just not suitable for outdoors.

If anybody is interested in a pair of HP50S, there's an ad in a Japanese site still at a very reasonable price (<10$), PM me or do some searches.

Quote:

Originally Posted by leeperry 

 

I liked your previous damping idea, wha was so wrong about it? One thing you could try is sanding off the foam from the "acoustic barrier" and use the latter only. That does wonders IME, mostly because that foam was meant to attenuate the whine of computers fans....not quite what we need.

 

it got a sterile sound and lost the "sparkling" with too much damping in the center area. for example: Vivaldi from Trevor Pinnock sounds open and airy as if you are standing in the center ot the concert room with the electrostats and the HP1 sounds as if you are standing in front of the open door. I like your idea of using the barrier part of the composite foam - have to try this one next time.

Quote:

Originally Posted by ferrytrainhp1 

Hi,
I was wondering if anyone had a pair of HP 3s They would be willing to sell.
preferably located in Australia.
I have a pair of HP 1 s which I really love and I think that the HP 3 would be a great portable headphone.
Thanks.

I tried my different Yamahas and came to the conclusion, that neither yamaha ortho would be a good idea for portable use: the HP50 (same as HP3) needs more power than the HP1 for the same output and the HP2 even more than the HP50. The SFI's would be a better choice for portable use. btw: my HP50  sits very tight on my head (I would prefer it a bit lighter), so it depends on the usage over the last 30 years, if the mechanical properties fit the portable use.

Quote:

Originally Posted by bruma 

I tried my different Yamahas and came to the conclusion, that neither yamaha ortho would be a good idea for portable use: the HP50 (same as HP3) needs more power than the HP1 for the same output and the HP2 even more than the HP50. The SFI's would be a better choice for portable use. btw: my HP50  sits very tight on my head (I would prefer it a bit lighter), so it depends on the usage over the last 30 years, if the mechanical properties fit the portable use.

I find my two sets of SFI drivers to be equally power hungry as my HP3, which causes drops in bass quality and distortion at higher volumes on my PA2V2, which don't occur at home on my full size amp. 

But I agree that they're good for portable use - there's no need to turn it up to ear-bleeding levels to enjoy them.

I wonder if there's a way to make my HP3's headband tighter? 

Sniffing out the Unipolar again. Seems like Sennheiser used a reflex disc at the back of the driver. Not sure what material it is since it's inside the driver (under what looks like saran wrap), but it has a plasticky sense to it. The right driver has it attached to the middle of the driver, but unfortunately on the left side it has come loose and is moving around freely under the wrap.

Also noticed that the frequency response in the bass and lower mids is flatter when the side grille (to which the pad attaches) is taken off. Plopped some AKG pleather pads on the naked baffle and had a listen - it's pretty decent like that. The improvement is either due to removing the side grilles or because some wear and tear was shed when I opened the cups, who knows. In any case, the bass then extends relatively flatly and without distortion to 40 Hz or so on the level of 1 kHz, which isn't bad. Not surprising either, considering the size of the driver.

Quote:

Originally Posted by vid 

Sniffing out the Unipolar again. Seems like Sennheiser used a reflex disc at the back of the driver. Not sure what material it is since it's inside the driver (under what looks like saran wrap), but it has a plasticky sense to it. The right driver has it attached to the middle of the driver, but unfortunately on the left side it has come loose and is moving around freely under the wrap.

 

Also noticed that the frequency response in the bass and lower mids is flatter when the side grille (to which the pad attaches) is taken off. Plopped some AKG pleather pads on the naked baffle and had a listen - it's pretty decent like that. The improvement is either due to removing the side grilles or because some wear and tear was shed when I opened the cups, who knows. In any case, the bass then extends relatively flatly and without distortion to 40 Hz or so on the level of 1 kHz, which isn't bad. Not surprising either, considering the size of the driver.

Pics?

After taking the pictures, I took a screwdriver to the protective plastic wrapping by accident. Made it an unfortunate-looking groove, but I don't think it went all the way through. Oh well.

The driver diameter is roughly 104 mm and the effective area is about 90 mm.