Checks should have been done as soon as the amp was received. I don't think your friend has a leg to stand on since it has been over 1 year. Some high volume dealers may mix stuff up but most of the time if they deal in high volume they have good inventory control.
Also as long as they got a Cary v12i amp and not a totally different amp then what is wrong if the serial numbers are different? Is each Cary amp customized or is this amp a collectors item where having a lower number from the run matters? I'm just confused as to how the serial numbers would really matter in this situation.
Your friend could try to talk to Upscale Audio but even then what can they do? The other Cary v12i with the serial # might have been sold already. It has also been over a year.
I think your friend may just have to enjoy the amp he has.
Also as long as they got a Cary v12i amp and not a totally different amp then what is wrong if the serial numbers are different? Is each Cary amp customized or is this amp a collectors item where having a lower number from the run matters? I'm just confused as to how the serial numbers would really matter in this situation.
Your friend could try to talk to Upscale Audio but even then what can they do? The other Cary v12i with the serial # might have been sold already. It has also been over a year.
I think your friend may just have to enjoy the amp he has.