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Results of a HD600 Burn in Experiment! :) - Page 3

post #31 of 49
Quote:
Originally Posted by espire View Post
Hmm... This thread is tilting me closer to taking a stance that is entirely skeptical of burn-in.

While many replies agreed with the original post, they were agreeing that the HD600 doesn't benefit much from burn-in, not that that burn-in is of little use. Would all you HD600 owners have said the same thing about your burn-in experience if not for the results of this experiment?

In the case of burn-in's true existence, I just can't see one headphone improving 2%, while another improves by magnitudes. Sure, there can be a window, but not one like that. Dynamic drivers are still dynamic drivers.
I'm not here to start a war... I legitimately want to know. A quick, but logical, explanation, and I'll shut up! I promise!
IME there's a window from no changes or very slight ones with the phones settling down pretty soon, like it happens with the HD600, DX-1000, or some Grados, to the extreme of cans that show very important changes. Again these changes may be huge for some, specially if you pay special attention to the affected sound features, or quite unimportant for others.
Which is true IMHO is that the overall character of the phones won't change, I mean that burn-in is not magic and slow fat sounding cans won't become speed-light fast ones. But burn-in can get you tighter and more defined bass, smoother treble, a more coherent and focused sound... it depends on the cans, you might even end up disliking the sound of some of them after burn-in. This has already happened to me with some IEMs.

Regards.
post #32 of 49
Quote:
Originally Posted by espire View Post
In the case of burn-in's true existence, I just can't see one headphone improving 2%, while another improves by magnitudes. Sure, there can be a window, but not one like that. Dynamic drivers are still dynamic drivers.
I'm not here to start a war... I legitimately want to know. A quick, but logical, explanation, and I'll shut up! I promise!

Who knows? I know my old 555s changed a lot and the 595s hardly any change. Could it be that the higher end models of some manufacturers are given some factory burn in? hmm, I wonder
post #33 of 49
Now, if you'd only gotten up to 301 hours on the broken in pair, instead of just 300, there would have been a "night and day" difference, I'm certain! : )
post #34 of 49
Quote:
Originally Posted by espire View Post
Would all you HD600 owners have said the same thing about your burn-in experience if not for the results of this experiment?
It has been mentioned quite often before about the HD600 and HD650, both by me and others. A simple search could clear that point up.

Edit:
Old post about HD650 burn-in.
post #35 of 49
Quote:
Originally Posted by espire View Post
Would all you HD600 owners have said the same thing about your burn-in experience if not for the results of this experiment?
Actually, Yes. I'm a firm burn in believer but with the 600s, differences are minimal to voodoo

I do hear a little change but it is in such a small degree that could be the result of just getting used to the sound of my new amp
post #36 of 49
I have never noticed any differences with my HD650's, but break-in was very noticeable with my RS-1's.
post #37 of 49
Burn in isn't a function of time, it is a function of temperature. HD600's are a particularly hi-temp burn in model. You won't hear changes below 300 degrees.

Ultrasones are so volatile they must be stored cold to prevent spontaneous burn in prior to purchase.
post #38 of 49
*Preheats oven at 375 degrees. Sticks HD600 in casserole and puts in oven.*

That's the correct way of burning in a HD600.
post #39 of 49
now did they just sound very similar or did you do a real test of speed, separation, detail, soundstage, tonality, etc?
post #40 of 49
I didn't notice much difference on my HD650.
post #41 of 49
Quote:
Originally Posted by bada bing View Post
Burn in isn't a function of time, it is a function of temperature. HD600's are a particularly hi-temp burn in model. You won't hear changes below 300 degrees.

Ultrasones are so volatile they must be stored cold to prevent spontaneous burn in prior to purchase.
Are you serious?
post #42 of 49
Thread Starter 
Quote:
Originally Posted by DoomzDayz View Post
now did they just sound very similar or did you do a real test of speed, separation, detail, soundstage, tonality, etc?
Well we repeated passages in several tracks several times for 1-2hrs, and If both had the same clamp force and we were to do the experiment again, it would be very hard to tell the difference between the two. What do you mean by "real test"? I don't see how we could make the test any more "real" unless you want to explain
post #43 of 49
Quote:
Originally Posted by nismohks View Post
this test is already an IDEAL test where everything is as best controlled as could possibly be. 2 identical units purchased at the same time from the same store. 1 was kept in the box (caution's) and the other was continuously run at moderate volume for approx 300 hours (mine)

so our conclusion is that for the hd600s we can say that burn in has minimal affects on sound quality.
This is far from an ideal test. The reason being the assumption that the 2 headphones were "identical", soundwise. Different units, even those manufactured one after another, can (and most likely will) vary in response. Unless you have some accurate response graphs to prove this, it's incorrect to assume that they were originally identical.

It's possible that originally the 2 units sounded fairly different but became more similar when one was burnt in. It's also possible that neither of them changed at all, and the difference you are now hearing is due to natural variations between units. Unfortunately, there is no way to know.

If you want to perform a valid test of burn-in, you would need to use a single headphone unit, and ideally you would also measure response pre-burn-in and post-burn-in.
post #44 of 49
Thread Starter 
I agree with what you said B0dhi, which is why I also stated in the part of our method that we didn't actually test how they compared against each other at 0 hrs. We tried to make the experiment as valid as possible, but we simply didn't have the tools to measure the response of the headphones
post #45 of 49
Yup the only interesting thing other than what was done is the test was to see if they both sound the same out of the box. then if they dont, then to come out sounding almost the same with both being burned in. It would show that some might have been pre-burned in at the factory and some havent.
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