That really sucks. I know utopias sometimes have a channel die. When I first bought mine (new) one of the channels was dead on arrival. Luckily, it was easy for me to just send them back and get a new pair.
Last I remember, Focal has a five year, transferable warranty, so I would suggest first finding out if yours are still under warranty, and see if Focal themselves can repair or replace the channel (or headphone - not sure what they do).
I unfortunately don’t know how possible or practical it is to try to repair them in the US, so we can see if others chime in there.
As long as you can get the receipt from the person you purchased from (and they purchased from an authorized dealer) or you can find out what store they purchased from and reach out to them you should be fine for repair. Most repairs are done in Focal’s Canadian headquarters in Quebec unless it requires a certain part.
I swapped the right and left plugs and there still was no sound on the left channel. Also sent the old cable to the manufacturer for repair, who said there was nothing wrong with it but sent me a new one anyway …
I don’t have a digital multimeter … I see one for 12 bucks on Amazon. But since I am confident the problem isn’t the cable, not sure it would be useful?
I should have asked for one when I bought it from him, but now I’ll have to hope he checks messages on Audiogon, which might not happen anytime soon. But I’ll try and find his contact some other way. I have the shipping box so maybe there’s something on there …
I think I have a certain magnetic frequency that causes gear to go wonky. It’s more unusual when a piece of hi-fi equipment actually works perfectly for five years straight. Even brand new gear winds up going right back. So I dunno … But if there’s some history of the Utopias dropping a channel then that’s good to know.
They are asking for the original receipt. I’ve messaged the original owner, but if he no longer has it I’m stuck paying all the shipping, plus $80/hr. labor and parts (which is the scary part). It was a $2300 purchase of a 4k headphone, so, OK, I got a great deal on it, and if we’re only talking a couple hundred bucks no problem, but they seem like a company that might charge a lot for parts. Anyway, if anyone has additional thoughts would be happy to hear them … (I guess I won’t be buying any more second-hand Focal pieces).