Headphones volume is low

I noticed that the sound coming out of the back of the headphones is actually louder from the front so now I put them on backwards so I can hear louder.

has anyone heard of such a thing? how can it be fixed or do I have to buy expensive iphone headphones again?

I paste the text because i have the same trouble with my headphones

https://discussions.apple.com/thread/3029814?start=0&tstart=0