the301stspartanHave you made sure it's not the connector?
have tried it with both my desktop and laptop and with the desktop it would be mostly fine but when i moved it around it'd sometimes go in and out
i do have another 1/4 inch to 1/8 inch adapter and could try it with other headphones but i think its probably the headphones themselves
now that i think about it tho it probably go messed up on the drive home from uni cause it was relatively fine until i got home and plugged them in for the first time and could only hear from the right ear