Not ALL masonite stuff is totally worthless...
Not EVERYTHING with masonite is automatically total rubbish, at least if the masonite is on the bottom, instead of the back. The Marantz 4025, a weird concoction that it seems no one wants any more combines a receiver with a cassette deck in one case, and has a thick masonite bottom.... It isn't exactly Marantz's best creation, by a good margin, but nevertheless this neglected unit has that same rich, classic Marantz sound that the other "golden era" Marantz units had. I'd say the sound is comparable to any of the lower half of the Marantz 22XX series: the 4025 definitely beats a 2216B I have for sound quality, in spite of it's crappier particleboard case and fiberboard bottom, vs. the all-steel of the 2216B. Marantz cut some cost corners with the combined unit in areas like the case, but not on the sound. It's one of the best sound-quality-per-dollar bargains out there, IMHO.
Good enough sound. in fact, that I'm investing time to custom-make a nice new plywood case for mine, which I'll probably finish in black piano lacquer, and I've bought a second unit for parts reserve... in spite of the masonite bottom!
Of course, there is one more reason for fixing one up: the 4025 is nearly two feet wide and 16 inches deep...with all its shiny knobs and switches, and given a new shiny black case to complement that all-silver front, anyone walking into a room with one will be impressed no end by it, way beyond whatever it sounds like. I'll get a grin on my face each time I see it, whether I listen to it much or not!

If you stack three of these, you'll have a credible space-ship control panel!