Big Philips fan here, too... exactly because, for many years, Philips branded electronics were virtually non-existent in the USA. Early on (1950's), Philips was prohibited by copyright (Philco/Ford) from using its name in the USA. For a long time, they used Norelco (North American Phi
Lips Co.) instead, but started using Magnavox after they bought the company in the '70's.
In the '90's, Philips began using its real name on products in the USA, but introduced it gradually, by calling its electronics Philips-Magnavox for a while, and its personal care products Philips-Norelco. Eventually, that scheme ended and we started seeing pure Philips electronics and household gadgets (along with professional - medical - equipment). Philips kept the Norelco name on its USA shavers, figuring the trademark was too ingrained in the American mind to abandon it, and has started using the Magnavox name again on its low-end electronics.
My collection not only consists of Philps boomboxes/radios from around the world, but Philips household items from Canada (the name has always been big there) and as much Philips promotional/advertising junk as I've been able to accumulate, seeing as how I don't live in Canada or Europe: pins, toys, ashtrays, a thermos, speakers, signs, a camera, banners... you-name-it.
So... Philips WAS Magnavox in the USA for many years, including the Boombox Golden Age of the '80's. Not every boombox Philips ever made got here as a Magnavox, but every Magnavox we got was a rebadged Philips. Like this D8803, an "elephant" released in the USA by Philips: