I’ll try to be as brief as possible, but I’ll also try to give some details on the situation. Pardon me if the post is too long.
I went to the USA last year, and I was really excited because I was going to buy a new headphone and amp that I coulnd’t find on my country. I bought a HD660s and a FiiO K3. I really loved it, it was supposed to be the endgame headphone for me. In May of this year, I was listening to it, normally, put it down, went to the kitchen to take something to eat, when I came back, the left side of the headphone was silent. Tried different cables, different sources, it was just dead.
I got in contact with Sennheiser in my country and they couldn’t offer the warranty here, but they could make a technical analysis and if it was indeed a problem that couldn’t be fixed, they would put me in contact with Sennheiser USA to send me a new pair, but I would have to pay for taxes and shipping.
They told me that the left side driver was dead, the voice coil burnt for some reason, and I agreed to pay for the taxes and shipping to get a new one.
I also wanted to try a new kind of sound, a more open and bright sound, specially for classical and soundtracks. I found a store selling a AKG K702 and I bought it. I was enjoying it, quite different from the HD660s. 3 days later, I picked it up and the left side was dead. Okay, weird. I got a refund from the store, but I started investigating what it could be.
I was most suspicious of static electricity, because my room had carpet flooring and I had a steel desk (coated with epoxi but still steel) and also I was suspicious of the FiiO K3, maybe not powerful enough, causing clipping? I don’t know.
I actually changed the carpet flooring for vynil flooring, I hated that carpet since the day I got my feet on this apartment. I also sold the K3 and bought a FiiO K5 PRO, much more powerful, should drive most headphone without issue.
In the meantime, Sennheiser started selling audiophile headphones here in my country so I would sell the new one coming from the USA and buy another one here to have proper warranty.
The new one arrived, and working properly. When the one from USA arrived, I managed to sell it pretty quickly (actually impressed me).
Now, last saturday I was playing some games, listening some music at night, using it normally, and then I unplugged it from the amp, hanged it on my little headphone hanger, turned off the amp, turned off the pc and went to bed. Next day, I turned on the amp, plugged the headphones, raised the volume and the right side was dead. Without even giving a signal.
I don’t listen to loud volumes, I’m getting rid of my steel desk (it’s probably not it but whatever) and I don’t freaking know what caused it this time. I’m already in contact with Sennheiser and they’ll probably give me a new one, but I’m afraid it will happen again.
I’ll call an electrician to take a look at my apartment’s power, but I’m not sure it’s that because, as I said, the headphones never gave any signals of something going wrong, and my other electronics work just fine.
Does anyone have an idea on what can be causing this? Just bad luck or I should call a exorcist?
I’m really sorry for the long text
EDIT: Forgot to tell, but, everytime the headphones died, I switched back to my Sony WH-1000XM3, that I use most of the day actually, because it’s really noisy here during the day, and I always use them plugged into the amp as well. So far they are surviving and also never heard anything weird coming out from them.