Hi all!
 
I have this strange question....
 
I've owned a set of Sennheiser HD-580s for quite some time (perhaps 20 years). I've always thought about them as the best headphones I've ever owned, but over time, I've stopped listening to them.
 
Lately, I mainly use my Sony MDR-1A, or Sennheiser Momentum, or HiFiMan 400s.
 
The thing is, I used my HD-580s again and I found them quite boring. No highs, no lows, too much midrange.
 
At this point, I don't know if the headphones have changed their sonic signature, or I got used ot other sheadphones...
 
So, do you think headphones sound different over time? Perhaps the magnets become weaker? Or something?
 
Thanks!

I think it has to do more with your brain i have some hd 650 i stopped listening to them for about 2 or 3 months and had been using m70x very bright and analytical headphone and that made just think that the hd 650s were dark as ... but just start listening to them constantly again and you'll start hearing everything again

If I had to guess, I'd say your 580s are just inherently strong in the mids, much like the 600s. When I listen to my 600 after a LCD-2 etc. they seem quite middy and dare I say it, a bit boring. But, once my ears get used to the signature they're very nice.

Thank you for your answers! I'll try listening more to them and see how it goes. Its fun to see how different each headphone is!

Some do.
 
The Sony R10's diaphragms were made from bio-cellulose formed from bacteria. There are few surviving R10s today and that's why they command such an extraordinary price.