One thing that continuously frustrates me is the version/batching theories of headphone production lines.
Two HD800s or T1s may sound different out of box [1] , or maybe they sound similar initially but different after some time of use[2].
From my own experience, the new HD800 I got from Amazon and the used HD800 I got from headfi did sound very different in the bass compartment (seller had less then 100 hours use) with the later serial number more bass heavy, and now I just got a little overly bright T1 here which again made me wonder if there is a version issue because there are so many contradictory listening experience in headfi (of course, there is even a thread about dampening T1 [3]).
It's hard to find official announcements , reports/statistics , or any explanation of these phenomenon from headphone producers. I'm wondering whether the headphone manufactures by default want us to assume that headphones of the same model should sound nearly the same. It seems like a serious issue if the producers can't control the quality to the degree that there is so observable difference in major frequency reproduction, or they want to adopt to new market needs without announcing an official version change.
Just want to know what you guys think about it and your experience
[1] http://www.head-fi.org/t/433059/sennheiser-hd800-certificate-for-frequency-response-arrived/255
[2] http://www.head-fi.org/t/508836/the-official-beyerdynamic-t1-owners-club-appreciation-discussion-thread/2910
[3] http://www.head-fi.org/f/4/headphones-full-size
Two HD800s or T1s may sound different out of box [1] , or maybe they sound similar initially but different after some time of use[2].
From my own experience, the new HD800 I got from Amazon and the used HD800 I got from headfi did sound very different in the bass compartment (seller had less then 100 hours use) with the later serial number more bass heavy, and now I just got a little overly bright T1 here which again made me wonder if there is a version issue because there are so many contradictory listening experience in headfi (of course, there is even a thread about dampening T1 [3]).
It's hard to find official announcements , reports/statistics , or any explanation of these phenomenon from headphone producers. I'm wondering whether the headphone manufactures by default want us to assume that headphones of the same model should sound nearly the same. It seems like a serious issue if the producers can't control the quality to the degree that there is so observable difference in major frequency reproduction, or they want to adopt to new market needs without announcing an official version change.
Just want to know what you guys think about it and your experience
[1] http://www.head-fi.org/t/433059/sennheiser-hd800-certificate-for-frequency-response-arrived/255
[2] http://www.head-fi.org/t/508836/the-official-beyerdynamic-t1-owners-club-appreciation-discussion-thread/2910
[3] http://www.head-fi.org/f/4/headphones-full-size