Dear @cjaronica: You can make your own findings here:
https://www.vinylengine.com/library/technics/sp15.shtml
https://www.vinylengine.com/library/technics/sp25.shtml
R.
https://www.vinylengine.com/library/technics/sp15.shtml
https://www.vinylengine.com/library/technics/sp25.shtml
R.