I notice it in my car (two speaker system) with a lot of "classic rock" era music too. Beatles in particular are a good example as are some ELO tracks. I really noticed it when one of my speaker connections was failing intermittedly and I was listening to music I know well and couldn't figure out where the missing intrustments went!
My mom has all our Beatles vinyl, would be interesting to see what verions she bought when they were new.
I love the Beatles once they got on the drugs
