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Author Topic: Abyss planar headphones by JPS Labs  (Read 21630 times)

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Marvey

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Re: Abyss planar headphones by JPS Labs
« Reply #50 on: October 20, 2012, 04:13:21 PM »


The ortho question I had was what effect the polarizing effect of the front slots was - I think this is a factor in all orthos and is a tough one to escape.

..dB


The slot arrangement is definitely measurable and has differing effects depending upon how the headphone is situated. If the slots are big enough, I doubt it will have any serious affect on our preception. But to be on the safe side, an approach where a bunch of little round holes are drilled into the front plate is preferable to have an more even damping / pressure release across the entire surface area. This would result in less distortion and more linearity (as when I made more symmetric the coffee filter holes across of one of RD's T50RP mods.) However, this may not even be necessary in the first place for this application.

I can definitely see precise alignment being a necessity since the magnet is on one side. There are some theoretical issues with this: magnet strength will diminish exponentially as the diaphragm gets farther away from that one magnet. This could be a cause of distortion, but who knows? Maybe they've pulled it off. I can see a light thin tightly suspended driver to keep driver movement to a minimum, but this will result in no bass, which seems consistent with impressions.

So great; the prototype sounds like an Ortho version of the SRH1480, but with added ringing. All for $5k. The headphone really looks amateur hour. Companies should not make $5k products that look unfinished with a ghey spider pattern, a ghey name such as Anal-Abyss in a ghey gothic / haloween typeface to present at a tradeshow. $5k headphones at a minimum need to look like the two Sony Qualias or the original STAX Omega I. The 009 doesn't even really cut it looks-wise.
« Last Edit: October 20, 2012, 04:19:41 PM by purrin »
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rhythmdevils

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Re: Abyss planar headphones by JPS Labs
« Reply #51 on: October 20, 2012, 06:34:59 PM »

I still disagree with you about poking more holes in the T50rp, that changed the FR simply because the driver was damped less.  It wasn't about making it more symetrical, the same thing would have happened if you poked holes in the way I suggested, in the same pattern I was doing it.  Uneven damping can be a good thing with orthos IME.  If done right, don't you think it could help break up standing waves on the driver by pushing it to move in different ways? 
« Last Edit: October 20, 2012, 06:40:24 PM by rhythmdevils »
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arnaud

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Re: Abyss planar headphones by JPS Labs
« Reply #52 on: October 21, 2012, 12:51:43 AM »

(Zazzy is a cutting edge technical term that it's not in the Audio Engineers Handbook yet.)

I like it, and you have the following to make part of the standard vocabulary  :)p6
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Tyll Hertsens

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Re: Abyss planar headphones by JPS Labs
« Reply #53 on: October 21, 2012, 04:12:49 AM »

There are some theoretical issues with this: magnet strength will diminish exponentially as the diaphragm gets farther away from that one magnet. This could be a cause of distortion, but who knows?

Yeah...that's the one that worries me. It'll be even order distortion, so maybe it'll sound good. Dunno.

$5000 is a bit nuts though.
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Tari

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Re: Abyss planar headphones by JPS Labs
« Reply #54 on: October 21, 2012, 04:17:20 AM »

$5000 is a precedent we want to avoid setting.
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jerg

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Re: Abyss planar headphones by JPS Labs
« Reply #55 on: October 21, 2012, 07:36:01 PM »

Yes, one single magnet  -  thought I had mentioned this before. They have them custom made so that they are a perfect fit for their grill. The polarity is front back and, from what they said, forms a strong uniform field. I have no idea how long it has been in the works but speaking to Joe's son , he verified that they went through a boatload of prototypes before finding one that gave optimal results. Driver alignment is critical and they use a jig to make sure they are consistent. He also said that it sounded best with no back at all but that leaves the driver exposed. One of the "tuning backs" they were toying with was some type of fine mesh.

The ortho question I had was what effect the polarizing effect of the front slots was - I think this is a factor in all orthos and is a tough one to escape.

..dB

That part I found to be quite true with Hifiman headphones too actually, that's why I've been experimenting with swapping out its stock (fairly thick) grills with mesh that is much less obstructive, and to great effect.
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justin w.

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Re: Abyss planar headphones by JPS Labs
« Reply #56 on: October 28, 2012, 12:43:37 AM »

Don't get me wrong: I'm FULLY open to the idea that small companies assemble stuff that isn't as "finished" as larger ones often times, and that prototypes especially are rough. Forget the LCD-2. I've got the LCD-1 which came in a ziplock bag. LOL. Then there's the TakeT H2+ which is one of the most awkward headphones ergonomically ever devised. These things can actually make a product endearing to me.

BUT. And this is a huge but: this is a product that costs $5,000.

It's going right up against the SR-009. Now, I realize more than anyone that different products serve different needs, and that our priorities themselves differ. I was just defending the Muramasa VIII, which cost upwards of $7,000, when it was first announced on head-fi. People were claiming it was ridiculous. And they were right. But I asserted that it was also something of a sculpture, an art piece that had a functional dimension.

And you know what? I feel burnt out these days. Having paid upwards of $7,000 for the Muramasa VIII, I can't help but feel a little taken advantage of, a little worn out and jaded. And we're talking about a product that, despite its many flaws, still had a lot of care and attention to detail.

These are prototypes, sure, but what I'm seeing (and hearing from people) is not boding well. Again: this is only really an issue BECAUSE they're asking so much for them. These are going to be the most expensive orthodynamic headphones ever made up until this point. You're going to have to bring something really, really big to the table, or you're going to have to expect to get reamed. I mean, I'm hearing from people they sound no better than vintage orthos, and I'm seeing that these guys can't even put in screws without getting the wood to crack around it.

I just can't help but think of my Muramasa VIII with its headphone stand bent at a 45 degree angle and its cracked display box.

This shit just doesn't fly when you get to this price point. Frankly, I'm sick of it. Now I'm fully willing to give JPS a chance! However they're going to have to do a hell of a lot, and *so far* I'm not seeing it.

one way that the overseas headphone shops stay in business:

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Marvey

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Re: Abyss planar headphones by JPS Labs
« Reply #57 on: October 28, 2012, 12:53:32 AM »

Ha Ha That's awesome!
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wilzc

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Re: Abyss planar headphones by JPS Labs
« Reply #58 on: October 28, 2012, 03:32:30 AM »

They're doing these 'certificates' for those lucky ones who get to audition the 'audio sensation' from the legendary headphones the Sennheiser Orpheus and the Muramasa.

I am not really sure why the muramasa is considered a 'legend'
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MuppetFace

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Re: Abyss planar headphones by JPS Labs
« Reply #59 on: October 28, 2012, 12:03:21 PM »

LOL. I own the Muramasa VIII.

The only thing "legendary" about it is the discomfort. That, and there are only like 5 or 6 in the entire world because the project was scrapped due to being such a catastrophic failure.

It doesn't sound bad, aside from the almost complete lack of bottom end presence. The mids and highs are clear, articulate, free of nasty resonances for the most part. It's overall what I'd call a very analytic and dry headphone. However it's completely ruined by the form-factor, which is by far the most uncomfortable thing I've even worn on my head.

I think their new lineup, what I'm calling the Pandora Trio, has the potential to do well provided they can keep the cost to 1/5th of the Mura and make it wearable.

Final.... what a company. As I've said before, I think they've got a mad genius working for them in their labs, but the corporate office acts as their own worst enemy.
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