how can I eq/balance my headphone?

[pomkar067]

I brought a headphone(JBL C100SI) and couple of month its left side became lower in volume as compare to the right one. So is their is any way to balance it , i mean for permanently not for any particular smartphone or PC. in short I want it sound balance for every device I connect.

 

[Alabalcho]

Are you sure the problem is with the headphones, and not with your hearing?

There are headphone amps with volume and balance control. Some of them are battery operated. But for sure will it cost more than $20.