Welcome, recently I've bought on occasion electret headphones ATH7 in very good visual condition. Unfortunately after few tests I'm sure that left driver is a little bit quieter than the right one. Electrostatic elements can go bad after a few decades, or at least that is my understanding right now. I hope that I'm wrong so there is any chance to fix it in quite easy way or simply I should send them back without any fix attempts? It's a pity because ATH7 sounds really good for me.
Thanks for help.






