Wrong.... There was no competition from Europe and Japan until the late 60’s and early 70’s.
Well, Volkswagen beetles—maybe the first subcompact—were all over the place in the 1960s (which I remember all too well), ditto for VW microbuses, that were common even in the early 60s as the first minivans, and became iconic as hippy transport later in that decade. And even in the 1960s Japanese transistor radios were almost a cliche, and I have a late-60s Panasonic table radio in my office. Makes a lot of static when you turn it on, but works great otherwise. Don’t want to forget my dad’s Grundig-Majestic cabinet AM/FM/SW with turntable hi-fi, either. He got that around 1957. And I suspect your average home in Europe had radios and TVs made by companies like Grundig, Phllips and Telefunken (and in Japan Sony and Panasonic). Don’t think Zenith, Philco and Magnavox penetrated those markets. Too many trade barriers plus national pride.