General sound developments in radio, and other areas, question.

I'm a classically trained musician (and teacher) and enjoy listening to music for fun when I don't have to analyze/study it.

Since I'm new to older electronics, I am starting to notice some interesting tonal anomalies between lows and highs, also that tone control, even unrestored with my RCA Livingston with original caps (shame, I know) sounds great. I've actually used it as an example in my music production courses just to offer a comparison of different technologies.

I have learned that amplification and balancing highs and lows was something multiple companies were working towards, and the hi-fi developments removed the 'dead' spots and increased the range of frequency response in the output area. Isn't that what golden throat and other notable names for that idea attempted? I think I can hear the clarity that the golden throat (whatever it actually means) does to human speaking voices, but what should it do for music?

*Does having to work with monophonic output create a lack of depth during the production phase, and is it noticeable? I feel like I can hear it but I could also be plugging in missing detail due to my ear training.

*What I mean to say is that I perceive depth, and can actually hear what I would consider a face-first soundscape, since it is monophonic; I'm going to enjoy restoring the Livingston to compare and contrast tone and depth.

Additionally - that 1966 new vista console with am/fm phono has one heck of an output at even volume level 1.5 out of 9, it's too big for my apartment in the sonic respect.