Outside the USA items made there are most often too expensive, transport, changes due to voltage, certification costs, small sales volume and usually higher markups make them uncompetitive. Some nice products, my first DAC was an Audio Alchemy, very nice, AR speakers were well marketed in the UK and realistic in price, however typically here in Australia anything by MacIntosh for instance is at least twice the price it is worth, even stuff by Schitt is not cheap.
Made in USA
I love to support USA products as much as I can. Even if it costs more. Id say 2nd choice Europe or Japan. Last place China.
So USA made HiFi products I have are... Magnepan, Odyssey, Geshelli, Rythmik, Schitt, Bluejean, Belden, Analog Productions( vinyl). Musichall & Monitor Audio (UK), Nagaoka, Magomi(Japan),
Other USA made HiFi I know of.. Kilpsch (high end speakers), Jeff Rowland, P.S. Audio, Emotiva?
Im sure there are more. Please continue list and lets support our own.