Topic: Abyss AB-1266 Production Model Measurements and Review and Other Stuff (Read 17471 times)

TMRaven · « **Reply #30 on:** October 28, 2013, 03:43:14 AM »

I'm hoping the XC is really good as well. I could use a good pair of closed cans for work. Everybody's praising the X but there isn't much impressions of the XC.

Of the impressions I've seen they say the XC sounds closed and bassy. Bassy isn't bad in my book but I can't take too much closed-in sound.

jerg · « **Reply #31 on:** October 28, 2013, 05:38:48 AM »

So the 9kHz wall is just a very high-tension ortho 'wall of ringing'?

In that light then, wouldn't HE500s have one of the most slacked membranes in the planar magnetic field? It has a wall at 3kHz.

Drakkard · « **Reply #32 on:** October 28, 2013, 12:52:47 PM »

Quote from: purrin on October 27, 2013, 09:45:03 PM

Here is a look at how the pads adjust. This is probably one the more ingenious ideas I've seen. The pads are magnetically attached to the cups - similar to how the power supply cables attach to the MacBook chassis (unless Apple has changed this recently). The pads can be angled accordingly by how the holes are aligned with the screw heads. While this does not allow the infinite adjust-ability of how the STAX earpads can rotate, the 18 degrees seems to be granular enough given that once set in place, its not going to move.

Damn, they steal my idea ={
I wonder, what is radius of the open driver area?

jerg · « **Reply #33 on:** October 28, 2013, 05:58:59 PM »

Quote from: purrin on October 27, 2013, 10:49:22 PM

Quote from: n3rdling on October 27, 2013, 10:36:17 PM
Can we see the CSDs with the old dB/time ranges? The new one is kinda Audeze-ified...

LOL!

Here you go. Time scale to 5ms. Floor to -32 (which is roughly equiv to the -6db normalized start and -36db floor of the old graphs). What I need to do (pending) is write a conversion program from the ARTA format to CLIO.

It's fine that the new plot formats are in flux still, as the raw data is there. They can always be more efficiently processed into standard perimeters in the future.

AstralStorm · « **Reply #34 on:** October 28, 2013, 10:46:24 PM »

Quote from: jerg on October 28, 2013, 05:38:48 AM

So the 9kHz wall is just a very high-tension ortho 'wall of ringing'?

In that light then, wouldn't HE500s have one of the most slacked membranes in the planar magnetic field? It has a wall at 3kHz.

Likely oth. HE-500 has almost untensioned membranes, relying on air damping almost solely. Pity it is a bit flabby in the bass (D2/D3; not really fixable in this design, air damping is too weak? Jergpads help slightly but do not fix it.) and the wrong grille and cloth damage its treble resolution. (Removing the cloth tilts balance up though. Removing/replacing the grille is harmless and I recommend it.)

HE-500 can even present without any ortho wall, depending on the mood of the factory line and phase of moon. (or rather, humidity)

I have yet to hear the Abyss; Poland is 10-20 years in the past at least.

Marvey · « **Reply #35 on:** October 29, 2013, 03:08:41 AM »

Quote from: jerg on October 28, 2013, 05:38:48 AM

So the 9kHz wall is just a very high-tension ortho 'wall of ringing'?

In that light then, wouldn't HE500s have one of the most slacked membranes in the planar magnetic field? It has a wall at 3kHz.

I would appear the "ortho wall" for the Abyss is 9kHz. Indeed, the HE-500's wall is around 3kHz. (see graph below). Probably explains why the HE-500 is the "flabbiest" sound of them all.

This is all speculation based on available evidence of course.

chetlanin · « **Reply #36 on:** October 29, 2013, 09:56:20 AM »

Very interesting, everything. I wonder if the resonance at 1k will makes the piano sound nasal/clangy (?) I listen a lot to piano recordings, and have come to hate transducers with a peak in this area, where the piano already is at is at its loudest, and our hearing perhaps at its most sensitive (and recording engineers often do their best to make things worse).
The bump must be the fundamental resonance of the membrane, I think. A plastic membrane of this size with metal tracks on it would feel comfortable resonating just somewhere in this area! To get a fundamental resonance at an extremely high frequency like 9kHz, say, you would have to make it of ceramics or smth and without any kind of flexible suspension (if you ask me). Could the 9kHz ringing have to do with mechanical or acoustical concentric waves? The high Q suggests waves in bending material rather than in air, I would say. (otoh I am often wrong)
Anyway, keep up the great/enlightening work. Cheers, Olaf.

jerg · « **Reply #37 on:** October 29, 2013, 04:49:04 PM »

Quote from: chetlanin on October 29, 2013, 09:56:20 AM

Very interesting, everything. I wonder if the resonance at 1k will makes the piano sound nasal/clangy (?) I listen a lot to piano recordings, and have come to hate transducers with a peak in this area, where the piano already is at is at its loudest, and our hearing perhaps at its most sensitive (and recording engineers often do their best to make things worse).
The bump must be the fundamental resonance of the membrane, I think. A plastic membrane of this size with metal tracks on it would feel comfortable resonating just somewhere in this area! To get a fundamental resonance at an extremely high frequency like 9kHz, say, you would have to make it of ceramics or smth and without any kind of flexible suspension (if you ask me). Could the 9kHz ringing have to do with mechanical or acoustical concentric waves? The high Q suggests waves in bending material rather than in air, I would say. (otoh I am often wrong)
Anyway, keep up the great/enlightening work. Cheers, Olaf.

~1kHz ringing hump is quite nasty with piano indeed, for me.

It is evident when I use HE500s with stock pleather earpads that the pads introduce a ringing node around 750 Hz, which makes piano (especially tracks that have added reverb) blisteringly painful to listen to. It's one of the main goals of my earpad mod, to retain the pleathers' tonal balance while getting rid of that 750 Hz node.

Marvey · « **Reply #38 on:** October 29, 2013, 06:36:06 PM »

Piano is always a great test of FR linearity. Yes, the 1kHz bump can easily be heard. This is why I suggested PEQ earlier. I have some ideas how to get rid of it based on Jerg's research.

I already have a simple mod in place which shaves a little bit off the 1kHz bump and quite a bit off the mid-treble. Makes the headphone slightly dark sounding which is to my taste.

Thujone · « **Reply #39 on:** October 29, 2013, 07:07:56 PM »

Would you mind elaborating on the mod? Maybe it will help the 1kHz ski slope on my HE-400's...

Author Topic: Abyss AB-1266 Production Model Measurements and Review and Other Stuff (Read 17471 times)

TMRaven

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

jerg

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

Drakkard

Re: Abyss AB-1266 Production Model Measurements

jerg

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

AstralStorm

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

Marvey

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

chetlanin

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

jerg

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

Marvey

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

Thujone

Re: Abyss AB-1266 Production Model Measurements and Review and Other Stuff

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Author Topic: Abyss AB-1266 Production Model Measurements and Review and Other Stuff (Read 17471 times)