May I humbly suggest you send the amplifiers back to the manufacturer to have them checked and repaired?
The manufacturer can completely checked out the amplifiers. Provide the manufacturer ALL the information about your system: front end components, speakers, wires, power line, power conditioner, stand and configuration, etc. I'd include photos.
This way, the manufacturer can inform you if there's something wrong with your set up.
If the manufacturer repairs the amplifiers and they continue to have the same problem, the manufacturer should provide you support to ensure the issue gets resolved. If there's the same repeating problem with the amplifiers after they're fixed, and the manufacturer confirmed your system set up, they should fix the amplifiers without charge.
This is the level of support I expect from a reputable manufacturer, and as a person with multiple businesses (none of which I'm referring to are in our industry) - it's the level of support I provide my customers.
If the manufacturer does not provide you this support, you'll have to realize you are on your own.
Personally, if I purchased any product - new or used, and I went to the manufacturer for support and was not supported properly, I wouldn't use that product.
If you do not allow the manufacturer to inspect, test and repair the amplifiers - and to confirm your system, then it's possible this issue will continue. And the manufacturer is not at fault because you are not asking / allowing them to support their product.
While it may be more expensive to allow the manufacturer to inspect, test and repair your amplifiers - it will be cheaper to get them fixed properly and eliminate this repeated problem. It will also allow you the ability to go back to the manufacturer for help should repeated failures occur.
If they do not offer you comprehensive support, then I personally wouldn't use their product.
The manufacturer can completely checked out the amplifiers. Provide the manufacturer ALL the information about your system: front end components, speakers, wires, power line, power conditioner, stand and configuration, etc. I'd include photos.
This way, the manufacturer can inform you if there's something wrong with your set up.
If the manufacturer repairs the amplifiers and they continue to have the same problem, the manufacturer should provide you support to ensure the issue gets resolved. If there's the same repeating problem with the amplifiers after they're fixed, and the manufacturer confirmed your system set up, they should fix the amplifiers without charge.
This is the level of support I expect from a reputable manufacturer, and as a person with multiple businesses (none of which I'm referring to are in our industry) - it's the level of support I provide my customers.
If the manufacturer does not provide you this support, you'll have to realize you are on your own.
Personally, if I purchased any product - new or used, and I went to the manufacturer for support and was not supported properly, I wouldn't use that product.
If you do not allow the manufacturer to inspect, test and repair the amplifiers - and to confirm your system, then it's possible this issue will continue. And the manufacturer is not at fault because you are not asking / allowing them to support their product.
While it may be more expensive to allow the manufacturer to inspect, test and repair your amplifiers - it will be cheaper to get them fixed properly and eliminate this repeated problem. It will also allow you the ability to go back to the manufacturer for help should repeated failures occur.
If they do not offer you comprehensive support, then I personally wouldn't use their product.