[DavidK]

I greatly appreciate all the time and effort you put in to my question!  Thank you!  It will take me a while to study my components now given your description, but I'm getting the feeling (which was my initial assessment) that I probably should persue modern speakers...which also has its challenges as I'd rather "harvest" them from someone's unwanted equipment instead of buying new.

I did purchase a $50 Pyle PCAU25P Amp so I could play around with Bluetooth (plus USB, Aux, and FM).  This (as everything "modern") is stereo so I've been pondering using two 6" mids even though it would "undo" the L/R stereo effect...or a 3.1 setup.  Right now I'm in the "analysis paralysis" stage trying to play "catch up" on a subject I've come to realize is a bit challenging for my aging brain!

My radio may have had some issue when I got it and my initial "investigation" may have made it worse, so it may be my "lessons learned" before touching my other two!