HD-650 burn-in? - Page 3

I am amazed by all the teases and laughs, I just wonder if that's due to my patience to play with props or what. Nevertheless I would post my log here:

1/8/11

Purchased. Bad plastic smell out of the box, sound great but definitely need time to open up.

4/8

~70 hrs, got better

6/8

~100 hrs, better but still muffed

10/8

~200 hrs, much better but can hear the stiffness and tightness of low and high

15/8

~300 hrs, really opened up mucho better. Everything's there.

23/8

~450 hrs, soundstage and extension got truly better.

29/8

~600 hrs, with high volume running thru last night, things got much better

5/9

~750 hrs, high volume cont. There's still something...

13/9

~900 hrs, need a better amp (than Fiio E9).

I guess volume/ sound pressure definitely play a role here. My listening and run-in volume is much lower than average cans lover around (at max like ~50% only). Afraid of "breaking" the drivers, it wasn't until nearly a month later I raised the volume to average listener's level, and that definitely make a difference. http://www.hkvwet.com/viewthread.php?tid=45703&extra=page%3D1&page=1

However, I do not find the lower end gears need this long time to open up. PX-200 ii, DTX300p, MX580, DTX100 and others I've played with and forgot, 100 hrs is truly enough and things hardly improve after that.

This sounds exactly the same as my experience with them.

I wonder if Connnorrrs' HD650's had been burnt in at the factory or maybe had been demoed in the shop before he got hold of them?

Perhaps Sennheiser burn in some at factory and not others to get us all talking about it!?

Either way the difference between how my Hd650's sounded fresh out of the box and how they sound now is very different, 100% no question and definitely not just my ears becoming accustomed to the sound signature.

Quote:

Originally Posted by AlfredWong 

I am amazed by all the teases and laughs, I just wonder if that's due to my patience to play with props or what. Nevertheless I would post my log here:

 

1/8/11

Purchased. Bad plastic smell out of the box, sound great but definitely need time to open up.

 

4/8

~70 hrs, got better

 

6/8

~100 hrs, better but still muffed

 

10/8

~200 hrs, much better but can hear the stiffness and tightness of low and high

 

15/8

~300 hrs, really opened up mucho better. Everything's there.

 

23/8

~450 hrs, soundstage and extension got truly better.

 

29/8

~600 hrs, with high volume running thru last night, things got much better

 

5/9

~750 hrs, high volume cont. There's still something...

 

13/9

~900 hrs, need a better amp (than Fiio E9).

 

I guess volume/ sound pressure definitely play a role here. My listening and run-in volume is much lower than average cans lover around (at max like ~50% only). Afraid of "breaking" the drivers, it wasn't until nearly a month later I raised the volume to average listener's level, and that definitely make a difference. http://www.hkvwet.com/viewthread.php?tid=45703&extra=page%3D1&page=1

 

However, I do not find the lower end gears need this long time to open up. PX-200 ii, DTX300p, MX580, DTX100 and others I've played with and forgot, 100 hrs is truly enough and things hardly improve after that.

What exactly changes electrically that they require a better amp after 900 hours?

Quote:

Originally Posted by Head Injury 

What exactly changes electrically that they require a better amp after 900 hours?

It may simply mean that he's familiar enough with the phones that he can tell the limiting factor is now the amp.  Sennheisers are well known for their scalability with better amps.  It doesn't have to imply that anything changed electrically.
 

Well, if 7 Vrms and under 0.05% THD and IMD is a limiting factor, I gotta get me an HD650.

They are not a demo, and I don't believe they were treated any differently at the factory than what you have.
 

Quote:

Originally Posted by essex853 

This sounds exactly the same as my experience with them.

 

I wonder if Connnorrrs' HD650's had been burnt in at the factory or maybe had been demoed in the shop before he got hold of them?

Perhaps Sennheiser burn in some at factory and not others to get us all talking about it!?

 

Either way the difference between how my Hd650's sounded fresh out of the box and how they sound now is very different, 100% no question and definitely not just my ears becoming accustomed to the sound signature.