I am so sorry you have to through this horrible ordeal. When you pay ten grand for a pair of amps, you should expect to be treated well by the dealer, distributor and manufacturer. All three have failed you. I read a lot about goods manufactured in China with poor distribution and service and while the products are very tempting, I always shrug them off. I had been eyeing the LM CD player which I was thinking of using in my office system as the McIntosh player I am currently using is getting long in the tooth. Not anymore though. If little else, I thank you for steering me away from possible headaches. I hope you have a happy ending but from experience, it looks like you are going to have a fight ahead of you. If all else fails, hire an attorney. Best of luck!
My terrible Customer Journey with the Line Magnetic LM-503PA Mono Vacuum Tube Amps
Spoiler: Would I recommend buying a Line Magnetic product? Not when you are in Germany or Austria.
I don't know how the customer support in the United States is, but my customer journey with the Line Magnetic LM-503PA Mono Vacuum Tube Amps in Vienna is terrible.
In the Summer of 2021, I spent 10k on a pair of Line Magnetic LM-503PA mono vacuum tube amps. This was by far my worst decision in 40 years of buying hi-fi gear.
So far, I have enjoyed listening with the amps for 11 months. But for 5 months, I couldn't enjoy listening with the amps because of defects and ridiculous customer support. As I'm writing this, my Line Magnetic LM-503PA is defective at the distributor for repair for more than four weeks, and Line Magnetic has not even sent the missing spare parts from China to Germany yet. But this is just the tip of the iceberg of my terrible customer experience with a Line Magnetic product.
This is why I wrote a customer report about my journey with the Line Magnetic LM-503PA mono vacuum tube amp. The report is about many customer-unfriendly emails, a dealer who doesn't answers emails at all, the European Line Magnetic distributor holding my amp hostage, and Line Magnetic in China refusing to answer my questions.