most human grade on themarket is fake anyways, just about every source that sells humn grade amps sells fake ones now and then even the ones who tr to be as legit as possible. but with these high quality fake amps most of the time it seems the counterfeiters put real gear insid. so were not really talking about totally bunkstuff. i liked his gear but wouldnt buy from him because i can get it cheaper elsewhere. if you come across some z line(sealed, labeled) and are wondering whether you should try it out my suggeston is to go ahad. worked good for me.