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LCD3 Measurements
Nov 19, 2011 at 4:46 PM Post #106 of 236
My take on the John Grads SR series sound vs the Audeze sound is that they are almost opposites.  I consider my SR325is to be shelved up a bit with the flat part of the shelf starting a bit before 2000 Hz.  I consider my LCD2 r2 to be shelved down a bit with the flat part of the shelf starting at about 2000 Hz. 
 
When I EQ my SR325is I do a shelf EQ that lowers them a few dB from about 1700 Hz on.
When I EQ my LCD2 r2 I do a shelf EQ that rasies them a few dB from about 2000 Hz on.
My HD600 I consider to be right in the middle in that it doesn't sound shelved up or shelved down.
 
The Grado sounds forward and in your face.  The HD600 is headphone neutral.  The LCD2 sounds set back, the opposite of forward.
 
Nov 19, 2011 at 5:31 PM Post #107 of 236


Quote:
purrin said:
Honestly, I just want a manufacturer to release a dynamic headphone that is neutral sounding with the cutting edge resolution of the latest headphones. HD800 is too bright. LCD3 is too dark.  Just my 2 cents.
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Maybe you should try a HifiMan HE-500. They say that is somewhere on the middle of these two, and Tyll's FR data seems to confirm it. And I desperately need a HE-500 CSD plot 
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Nov 19, 2011 at 5:35 PM Post #108 of 236
Purrin this is great stuff. Thanks for taking the trouble to explain it.
 
Nov 19, 2011 at 9:05 PM Post #109 of 236

LCD3 Peaks and Dips

So I wanted to get down to the cause (or at least verify) the 13k dip and 18k peak on my LCD3. I removed the metal cage and measured the headphone from the other side. I figured with this method, we can at least get closer to measuring the driver without the influence of the cups and ear pads. (On Sachu's advice, I did not remove the felt glued to the driver frame because I wanted to keep warranty intact.) Here are the results:
 

LCD3 driver (other side with metal cage removed)


Overall the CSD is a little bit messier than the measuring the right way (see graph below), probably because to proximity of the plate to the microphone. We note that the 13k dip and the 18k peak are still there at the same spot, but at a much lower magnitude.
 

 
I think it would be reasonable to say that the dip and peak are there, but not nearly as bad as the regularly done measurements would suggest. What we see in the regular CSDs are enclosure effects. How much our ears and brains can filter from the effects of the enclosure is up for debate.
 
 
Nov 19, 2011 at 9:31 PM Post #110 of 236

      Quote:
plin said:
Maybe you should try a HifiMan HE-500. They say that is somewhere on the middle of these two, and Tyll's FR data seems to confirm it. And I desperately need a HE-500 CSD plot 
biggrin.gif
.
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I would ask you to send yours to me, but that may not be a good idea because are where you are. I'll see if I can get CEETEE to buy one.
 
 
Nov 19, 2011 at 11:40 PM Post #113 of 236
Hint: Then you should take back your generous plan to send your (now) Kirkland-Edition LCD-3 to us up here in the Bay Area...
tongue.gif
 
 
I just might want a pair of LCD-3 (and a pair of plys) instead.
 
Quote:
Originally Posted by purrin /img/forum/go_quote.gif
     Quote:

I would ask you to send yours to me, but that may not be a good idea because are where you are. I'll see if I can get CEETEE to buy one.
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Nov 19, 2011 at 11:43 PM Post #114 of 236
The Kirkland Bath Tissue Edition is definitely worth checking out. I have to admit I will actually miss them now when I send them up.
 
Nov 19, 2011 at 11:45 PM Post #115 of 236

     Quote:
recstar24 said:
Purrin, great stuff. Would love to hear your thoughts on the joe Grado hp1000.
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Still have 'em and  love 'em. Many of my thoughts on the HP1000 are dispersed throughout Head-Fi. But basically I'm amazed Joe created something in the 80s that can compete or even better (measurably in FR and CSD) than current TOTL headphones.
 
 
Nov 19, 2011 at 11:50 PM Post #116 of 236

 
Quote:
purrin said:
     Quote:

Still have 'em and  love 'em. Many of my thoughts on the HP1000 are dispersed throughout Head-Fi. But basically I'm amazed Joe created something in the 80s that can compete or even better (measurably in FR and CSD) than current TOTL headphones.
 
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Cool, I love them as well. I know joe has a plethora of equipment but I believe the sonic design of the hp1000 was primarily by ear, making it even more remarkable. 
 
 
 
Nov 19, 2011 at 11:52 PM Post #117 of 236
I spoke with Joe a few months back. I'm so tempted to get them "upgraded" by Joe, but $1300 is a bit much.
 
Nov 20, 2011 at 2:05 AM Post #119 of 236
Marv, thank you for the illustrations , an image is better than a thousand words :wink:. Tyll and I got something cooking about this, I think people will appreciate...
 
For the 12k dip I would have guessed it is simply a resonance in the earcup volume (very typical) which would disappear with different mic to driver distance / reseating / different measuring rig. But your data in reverse seem to suggest something else?
 
The 18kHz sounds more like a driver resonance. I wonder if my assumption about periodic structure holds any water (membrane pocket modes forming when you get half a wavelength in between the traces). That I could actually simulate if I had the diaphragm and trace pattern.
 
 
 
 
Nov 20, 2011 at 4:37 AM Post #120 of 236


Quote:
purrin said:
I spoke with Joe a few months back. I'm so tempted to get them "upgraded" by Joe, but $1300 is a bit much.
Click to expand...

It is a lot of money and you probably won't get it back if you sell them but I think the phones sound at least $1300 better after the upgrade. 
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