[LastDayz]

I remember my headphones having more bass and it really stood out...now it just blends in with the other sounds.
 
These are the headphones I use... ihome ib40
 

 

[ieee754]

Your ears just adapted to their sound. You can always EQ down other frequencies or just stop listening them for some time. Also it's possible that if a pleather from your earpads is gone off, that their sound signature has changed. It happened to me with Sennheiser HD218, after few years of usage there was no skin on pads and they were bass light and more airy sounding (and they leaked like semi-open headphones).

 

[HeadBanger]

Your ears just adapted to their sound. You can always EQ down other frequencies or just stop listening them for some time. Also it's possible that if a pleather from your earpads is gone off, that their sound signature has changed. It happened to me with Sennheiser HD218, after few years of usage there was no skin on pads and they were bass light and more airy sounding (and they leaked like semi-open headphones).

I never thought about pad wear and tear affecting sound but you're right!

 

[AudioZ4]

The sound changes overtime when the drivers loosen up, Its normal.

 

[ieee754]

  The sound changes overtime when the drivers loosen up, Its normal.

That's highly debatable. So far there is no proof that this ever happens. Tyll from InnerFidelity measured driver changes from long burn-in in headphones, and there were only very minor changes in the FR, probably inaudible. From my experience, after I listen to bassy music for some time I perceive my headphones to have much less bass, until I give myself some break and then it gets back to normal.