I don't know about amps but recently I have been exposed to complex computer cards performing complex operations manufactured by American companies which the Chinese have cloned PERFECTLY including the software and you can't barely tell if these are original or not, even more you contact the American company with the serial number and they verified was authentic (and I know it was a clone).
If they can do that they can easily clone and Amp
If they can do that they can easily clone and Amp