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Review - Ultrasone PRO550 w/ PRO750 Pads and PRO900 Cable **Updated Feb. 10th, 2012** - Page 5

post #41 of 68
Quote:
Originally Posted by Iceman23;13214432 
None of it's true. Headphones do not change physically after the first few moments of operation.

Cool story, then my brain's perception changed of how they sound after so many hours.
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post #42 of 68
Quote:
Originally Posted by bloke226 View Post
Cool story, then my brain's perception changed of how they sound after so many hours.
Exactly.
post #43 of 68
Quote:
Originally Posted by Iceman23 View Post
None of it's true. Headphones do not change physically after the first few moments of operation.
There's plenty of scientific proof for burn-in in dynamic transducer systems. Plenty.

http://www.audioholics.com/education...act-or-fiction

and my post here: http://www.head-fi.org/forum/thread/...15#post6338400

Most speakers and headphones / earphones function in exactly the same way, that via a dynamic transducer circuit.
post #44 of 68
Notice I said headphones. Speakers do take longer because of the size of the driver and the materials used. But CERTAINLY NOT 300 hours. Now, the greatest change in sound you will get out a new headphones is in fact the way the pads compress and change shape (I don't consider this burn-in). This had a FAR greater impact in sound. Just like listening to a speaker and moving your head a few inches, you will fundamentally change the frequency response you hear. And, in any case, the way your brain adjusts to a change in sound signature is also has a FAR greater effect than so called burn in.
post #45 of 68
depends on the headphone circuit, Yes, the shape of the pads and the angle of the headphones on the head will affect the frequency response of the headphones, however it will not affect the sound fidelity of the headphone. I agree that burn-in is often overstated however. I've found that for headphones, it's normally the most difference within 50 hours and in-ears about the first 20 hours with the effect depreciating in time to effect ratio after that. (Of course smaller circuit = less mass moving = less burn-in time required).

Accommodation (your brain adjusting) can only account for ever so much. I've listened to headphones and in-ears of all different sound signatures so I know how accommodation works. Burn-in exists and it more than noticeable to everyone, not just 'audiophiles'.
post #46 of 68
Quote:
Originally Posted by chinesekiwi View Post
depends on the headphone circuit, Yes, the shape of the pads and the angle of the headphones on the head will affect the frequency response of the headphones, however it will not affect the sound fidelity of the headphone. I agree that burn-in is often overstated however. I've found that for headphones, it's normally the most difference within 50 hours and in-ears about the first 20 hours with the effect depreciating in time to effect ratio after that. (Of course smaller circuit = less mass moving = less burn-in time required).

Accommodation (your brain adjusting) can only account for ever so much. I've listened to headphones and in-ears of all different sound signatures so I know how accommodation works. Burn-in exists and it more than noticeable to everyone, not just 'audiophiles'.
So you're telling me you can hear MORE details after burn in? Then you would be making the contention that the driver's physical capabilities are drastically changed. Show me a scientific test done on headphone drivers (not speaker drivers), under controlled conditions (same temperature etc.), and most importantly, measurement of frequency response done in exactly the same way/same spot each time that supports your theory. But then are we acutally measuring burn-in or simply the change that occurs during the time the driver reaches operating temperature (which admittedly should not be very long for a headphone driver)?
post #47 of 68
Quote:
Originally Posted by Iceman23 View Post
So you're telling me you can hear MORE details after burn in? Then you would be making the contention that the driver's physical capabilities are drastically changed. Show me a scientific test done on headphone drivers (not speaker drivers), under controlled conditions (same temperature etc.), and most importantly, measurement of frequency response done in exactly the same way/same spot each time that supports your theory. But then are we acutally measuring burn-in or simply the change that occurs during the time the driver reaches operating temperature (which admittedly should not be very long for a headphone driver)?
I'm not gonna' bother looking for whatever evidence you're looking for, but pretty much every audiophile notices burn in improvement with new headphones of good quality.
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post #48 of 68
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post #49 of 68
There's little point in doing that as dynamic transducer / moving coil / electrodynamic (all the same thing, different names) headphones function exactly the same way (click on page 312) as a speaker using the same exact system. the speaker measurements are objective and take any sort of subjective-ness out of the equation. Burn-in is the physical change in the driver. You are actually making the moving coil driver worse to make it sound better.
post #50 of 68
Quote:
Originally Posted by Simca View Post
I'm not gonna' bother looking for whatever evidence you're looking for, but pretty much every audiophile notices burn in improvement with new headphones of good quality.
Of course you won't bother, I guarantee it will be hard to find, and for good reason. Not every audiophile notices it, it has simply become a common misconception that is transferred to any differences a listener might expereince when evaluating a new headphone. Like I said earlier, these differences can easily be attributed to changes in the headphone pads and psychoacoustics. Every time someone says "harsh treble that got better with burn in" SCREAMS psychoacoustics to me.
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