"Now, you’re probably going to take this the wrong way, but it seems to me you don’t know much of anything."So far, it seems that you are the clueless one. When I do not know, I ask. You claim and it is so wrong that it is sad. Many of us feel pity for you. It is not a shame to ask, it is a shame not to know and be "all-knowing" and insulting others. I apologize if my questions make you feel uncomfortable. If you knew answers to them you would not feel this way about them. If you were at least capable of understanding any of the questions, it would already be a milestone. But...refer to the first sentence and try to learn. Even if it is about naming portable CD players. Simple and unimportant stuff that you could even grasp.
You may not remember, but I do have WM FS-499 and D-421SP in a perfectly good condition. For whatever it is worth, I know how they sound. Better than expected, for sure. Far from great, though. When I get a chance, I will try connecting my Discman to amplifier. I admit I never tried that. I am curious how it is. I can tell you that portable Mini-Disc is crappy.