Dec 13, 2016 at 1:40 PM Post #6,121 of 27,074
  Different manufactures measure efficiency differently. The efficiency/sensitivity from different companies are therefore not directly comparable. 

 

LCD-4 need 482mVrms to reach 90dBspl

 

Abyss, need 320mVrms and 2.14mW to achieve 90dBspl

 

http://www.innerfidelity.com/content/technologically-impressive-lcd-4-planar-magnetic-headphone-measurements#4espkOLEI8pI2TCh.97

 

http://www.innerfidelity.com/content/jps-labs-abyss-ab-1266-planar-magnetic-headphones-measurements#gGzKxKyZvuVZTAWs.97

 
Both manufacturers list the sensitivity in dB/mW on their websites. (Whereas Sennheiser usually lists it in dB/V.) As far as I can tell, dB/mW means dB/mW.
 
Going from the manufacturer's own specs, I get these numbers:
 
Abyss
d3a95488_abyss.png
 
Audeze
4257fba2_lcd4.png
 
Tyll does not disclose where or how he got the numbers for the Audeze, but I'm just showing what the math shows.
 
Dec 13, 2016 at 1:43 PM Post #6,122 of 27,074
   
 
 
 
 
 
 
 
 
 
 
In addition to the above-discussed factors, one should consider that if hundreds of people buy a Chord product from Massdrop, they may unfairly blame Chord, at some point in the future, if they suddenly come to the realisation that they have to ship their product internationally, just to get a warranty issue processed, because their contract is with the retailer, not with Chord themselves, but Massdrop might not make this explicitly clear, at the point of sale.
 
 
.


Ahhhhh I see, thanks for the explanation.
 
I had to send in my Dave for a repair and Chord was first class all the way, so I see the value in having bought it from an authorized seller, it made everything smooth.
 
Dec 13, 2016 at 2:05 PM Post #6,123 of 27,074
Dec 13, 2016 at 3:12 PM Post #6,127 of 27,074
 
Hahahaha I love it! A totally candid and honest answer!


​In situations like that it's better to be honest, people will be more understanding and helpful if your honest, then if you lie, I have found that people can see thru lies.

 
 
From the above, I surmise that you are very probably:
 
1) male
 
2) married
 
3) wiser, now, than you used to be, when you were single
 
 
biggrin.gif

 
Dec 13, 2016 at 6:34 PM Post #6,135 of 27,074
Both manufacturers list the sensitivity in dB/mW on their websites. (Whereas Sennheiser usually lists it in dB/V.) As far as I can tell, dB/mW means dB/mW.

Going from the manufacturer's own specs, I get these numbers:

Abyss
d3a95488_abyss.png


Audeze
4257fba2_lcd4.png

Tyll does not disclose where or how he got the numbers for the Audeze, but I'm just showing what the math shows.


OT:

The manufactures are just showing an average mid value of the sensitivity and impedance, it is not static as the calculator are showing.

Then they could also be measured and published differently even that it says db/mW on both!, so you cant compare them yet, its like comparing an apple and a pear , so for the clarification in this matter i have
e-mailed Audeze and Joe @ Jps about the measuring they display on their sites.

We all believe in mathematics, but there is some missing bits in this crime investigation...
 

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