Originally Posted by kstuart
You did not bother to actually read my comments.
1 - My comments were about the SRH-1840, not the HE-400. Since burn-in is about the effect of constant vibration changing the flexibility of materials in products (which has been demonstrated in tests), it stands to reason that different headphones made from different materials would vary quite a bit in whether they change with use. Planars are very different from dynamics, which is why I was asking about burn-in experiences concerning the HE-400.
2 - I specifically said that I did NOT want the headphones to sound better after the burn-in, that I was only doing the burn-in, so that I could cite that in my review.
By the way, other comments refer to "brain burn-in", which is an interesting topic. We know that the brain does do this - when you first start listening to people who speak with a different dialect, they are hard to understand, but after listening to them for awhile, they become easier and easier to understand. Listening to familiar music with different equipment could very well have the process happening. If people listen to headphones for 100 hours, and it sounds better at the end, it could be "brain burn-in".
However, most of the people on head-fi who burn-in headphones run them in a closet with a music player, so "brain burn-in" does not apply in those cases....
My opinion on burn in:
I believe it is partially brain burn-in and partially gear burn in.
Headphones - my reference headphones are the Pro 900 for now. I believe I ve gone through several brain burn-ins as well as gear burn-ins
After the first week, the sound improved significantly except for highs which improved only slightly.
After the first month, I got either used to its sound signature, or the highs improved further.
Now, after three months, I still feel like the headphone is improving even today. A few days ago, I started listening at slightly lower levels and that helped as well.
Recently I bought a new ext. DAC, which again, helped noticeably (finally enabling to bypass the internal DAC in my computer soundcard)
Gear- The DAC I bought today. The first hour was bad. The soundstage was congested and the sound slightly muddy.
After that hour, bam! It opened up and the soundstage was clear. A significant improvement in clarity and clearness.
The DAC is NFB 3.32
Same with my headphone amp
So my conclusion, with headphones its mostly brain burn-in and then the headphones burn in. In terms of gear (amps+DACs) it is simply gear burn-in.
Now how these two work together (HP+AMP/DAC) i mostly a question of synergy and then their respectable burn-ins/brain burn-ins
Hope this helps :)
Best regards, Luke