[zombie1210]

My Christmas present to myself arrives tomorrow, a set of Grado PS1000's.
 
Will they require a "break in" period?
 
Will they sound different after being broken in?
 
I have read a little on break in, but I still wonder exactly what happens.
 
Thanks!

 

[McPatD]

There are many arguments regarding break or burn in. Many feel it has merely a placebo effect others swear by it. The pro argument is the drivers are physically moving parts and get loosened up from x hours of play. You will either like the headphones out of the box or you won't, burn in wont change the sound signature. I happen to feel some can be a little stiff sounding out of the box and I let them burn in for a couple nights with music that runs the frequency gamut. Nothing has truly been proven to my knowledge. I personally feel it has subtle effects but that may just be in my head

 

[zombie1210]

I don't see how they could sound much better, but I'm no expert.  They will be broken in soon, regardless. 

 

[zombie1210]

100 + hours and they do indeed benefit from some time. The bottom end has tightened up a bit, for lack of a better term. 
 
Very enjoyable headphones.

 

[priest]

^I found the same thing with mine, although I can't swear it wasn't "all in my mind." Congratulations on the new PS1000! Feel free to post any observations in the PS1000 appreciation thread.