As for the difference between the Denon X3800h and X4800h, maybe it’s because the X4800h is made in Japan.
True, ironically, if you browse the threads on ASR, you will find that there are a few issues the made in Japan 4800 experienced, a few need to send their units out for warranty repair, whereas there seemed to have no issues with the 3800. Anthem is no longer made in Canada or China either any more, they are now made in Vietnam, but of course designed in Canada.
Where they are assembled don't seem to be that important any more, it likely has more to do with the QS/QA systems used in the factories, they are good ones in any countries.
@M Code may be able to chime in on this, having seen me posting much any more though.
