elliottbnewcombjr
phono eq is very simple, standardized for all manufacturers since RIAA Industry Standard agreed to (right after or before most of us were born).This is mistaken. There have been a variety of EQ curves for the LP. In the US, RCA and Columbia used different curves for years, in part as a way to distinguish their products from each other. The IEC RIAA spec wasn't introduced until the mid-'70s. It uses a different LF roll-off and while some labels observe it, some don't. (Which may be a good thing.) Some European labels were using the CCIR curve well into the 1980s.