Its been a while since I have been on here, but I can confirm my Sennheiser IE7's are still screaming along and sound amazing as usual. I still look at them and think how and the hell do Sennheiser make these sound so amazing yet so full sounding and compact. I also have a pair of Sony MDR-V700DJ's which I use if I need bigger cans and not walking around all day. Well I have also decided to get a pair of Sennheiser IE8's, for around $479, usually retailing for about $599, so wondering if any burn-in is required with these? Some sites say this "burn in" is merely a theory and makes little if any difference at all. Note my IE7's and IE8's will be used primarily on my iPod / Laptop.
What is burn-in?
Some believe that headphones should be burnt-in to get the best sound out of them. There is no proper or best way to do this, and it’s debatable whether it has any effect at all. Just using the headphones will have the same effect, but if you want to hear what your headphones are capable of without waiting we suggest leaving a CD on repeat overnight at a reasonably high volume (nothing higher than you’d normally listen to). It is generally not a good idea to play sine sweeps or similar through the headphones as it can damage them. The main thing to remember is that this does not have to be done.
I look forward to any feedback.