Interesting point. So then are most musicians then actually producing music for mass consumption that they assume will be played on crap systems?
By the time a song reaches the production stage the
musicians have little, usually nothing to do with it. They go in the studio, record their bits, and after that its largely out of their hands.
What would Donna Summer have sounded like without Georgio Moroder?
The artist creates the intellectual content(sometimes with the help of professional tutors and session musicians), recording, mastering, production engineers, and outside composers create the
sound you hear in the final product.
Consider what the majority of the 50 million copies of Meat Loaf(assisted by composer Jim Steinman) "Bat Out of Hell" were originally played/heard on for systems. First copy i heard played to death was on a neighbors console, and high school friends' all-in-ones.
C W McCall sold over 2 million copies of "Convoy". How many of those do you think were played on a properly squared and level cartridge with ideal tracking force?
In both the above cases i can assure you that the engineers cared about what the listener was going to hear, and they went to lengths to make sure the consumer heard the best sound he could regardless of his playback system's quality, or lack thereof. It was the 70's and a lot of new music would be heard for the first time by drivers listening to a factory radio with a single oval speaker buried in a metal dash.
An introduction to Carol Kaye can be very enlightening for many enthusiasts. Enjoy.