Originally Posted by quartertone
Interesting - one never knows how far to trust one's perceptions of burn-in, but it seems to me that rather than smoothing out the FR, what's happened so far is more an opening-up of the soundstage. Anyone else experienced this?
Originally Posted by Wnuwk Siphon
That sure happened on my 750's. That and the bass settling down. I suppose there was a change in the way all elements of the FR became more of a whole, more of a unity, if that makes any sense. Hard to describe such subtle changes that happen over time, but they did. I doubt you'd be able to measure these changes in the FR though, but what do I know.
And of course there's still the age old disussion of driver burn in versus brain burn in, but personally I don't believe they have to be mutually exclusive.
Funny story about that.. I let a friend hear the 750's pretty much out of the box. He loved them but thought the bass was too overwhelming. Months later, in which I had used them every day for about 4 hours, so enough time for the drivers to burn in and my ears / brain getting used to the sound, I let him listen again. Without me saying anything about the sound, the first thing he noticed was how much the bass had settled down and the sound as a whole had become better. He was noticably surprised, saying "wow, I didn't know they were THIS good..". So yeah, my brain 'burned in'? Probably. Drivers burned in? Definitely.
Originally Posted by Wnuwk Siphon
The thing is, whenever I read about what people experience after burn in, they usually describe the change as "opening up". And in the case of these woodies, "settling down" has been mentioned quite a lot. How and where would 'opening up' and 'settling down' show up on a frequency response graph..?
I never really believed in the concept of burn-in for headphones and speakers per se but rather that one simply acclimates to the different sound signature produced by a new pair of headphones or speakers. Well, that was up until now...
I have been completely god-smacked by these new JVC HA-FX750s I bought over a month ago. The detail and timbre has been monstrous (as well as, the bass) and the comfort... oh, the comfort.
Any way, after about forty hours of usage, I was listening one night and sat up shocked by some very noticeable and new details I was hearing in a song that I did not hear (nor have played) since the day I bought them. The only way I can explain it is that the FX750s must have cleared up and/or settled down since I have purchased them?!
I made a few more comparisons and discovered one other song with those very apparent extra details. Even more interesting is that I am listening at a volume lower than when I first purchased the FX750s and even from what I usually listen at with my SE535s!
As much as psychological acclimation (getting used to a certain sound) could still be an explanation for what I am experiencing with my JVC HA-FX750s it seems to me more likely there really has been a physical and audible change???
Now my Shure SE535LTS-Js they never changed in the way that they sound... the sound signature has remained exactly the same since Day One. Could it be that the FX750s are dynamic driven and the Shures are balanced armature driven?
By the way the two songs were Emmylou Harris's Goodbye (from the Wrecking Ball album) and Fritz Reiner's 1954 CSO version of Also sprach Zarathustra, Op. 30: Sunrise.
Edited by WoodyLuvr - 4/26/15 at 3:44am