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Headphone Burn-in - Page 6

post #76 of 81
8/13/11 at 3:25pm

 

Quote:
Originally Posted by rohan575 View Post

it can be the dried out ear pads recovering


Good point.

 

 

Quote:
Originally Posted by rohan575 View Post

the increased weight explains the base response changing too you know

 

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post #77 of 81
8/16/11 at 4:25am

After finally having a pair that benefitted, heavily, from burn-in, I can say I know it's real now.

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post #78 of 81
8/17/11 at 9:07pm
Quote:
Originally Posted by NA Blur View Post

Tyll and I are going to do some double blind testing to see if we can identify which 701 is "burned it" and which is not.  I am also going to suggest we try to make one headphone look like the other sonically by moving the ear cups around the dummy head, adjusting clamping tension, etc.  If we can make one graph look like the other this would suggest that we did not measure burn in.  If no matter what we do we cannot replicate the result other than using the burned in headphone, then this would suggest the possibility we measured the process.


At a past meet, we had a pretty new pair of 702 and a 701 that was several years old. Using the same rig, we could hear a difference between the two. We then swapped the pads and the differences reversed. The difference wasn't the drivers but the pads.
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post #79 of 81
8/18/11 at 3:10am

exactly, the drivers as from my past experiments do not change in characteristics. None, of the electrical properties apart from weakening of the magnetic field strength (which takes a LOT of time to be significant) everything remains same. Especially when modern drivers are sealed  with corrosion resistant coils there is probably no electrical property (in my knowledge) which actually changes with time. 

 

The pads on the other hands do change,

 

Grokit:

 

the increased density of the pads (from moisture) actually do affect the lower end of the spectrum (longer wavelengths) more than they do for the higher end. 

 

 

Until and unless we have the technology to actually map quantitatively rather than qualitatively burn-in will remain an unsolved myth. 

 

 

 

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post #80 of 81
8/18/11 at 8:46am
Quote:
Originally Posted by rohan575 View Post

exactly, the drivers as from my past experiments do not change in characteristics. None, of the electrical properties apart from weakening of the magnetic field strength (which takes a LOT of time to be significant) everything remains same. Especially when modern drivers are sealed  with corrosion resistant coils there is probably no electrical property (in my knowledge) which actually changes with time. 

 

The pads on the other hands do change,

 

Grokit:

 

the increased density of the pads (from moisture) actually do affect the lower end of the spectrum (longer wavelengths) more than they do for the higher end. 

 

 

Until and unless we have the technology to actually map quantitatively rather than qualitatively burn-in will remain an unsolved myth. 


Gotcha, thanks. Perhaps this is due to less absorption and more reflection.

 

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post #81 of 81
8/18/11 at 8:57am
Quote:
Originally Posted by grokit View Post




Gotcha, thanks. Perhaps this is due to less absorption and more reflection.

 


Case in point is the tape mod on Grados. I also noticed an increase in bass impact and soundstage when I washed and dried my 701 pads with some weight on them. It made the cushion denser and put the driver closer to the ear.
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