@test It's too bad that the previous thread is now locked as it contained a lot of insightful and useful information. I personally get more from a discussion than I do from a lecture.
The problem with the previous thread is that is that the behavior was not polite nor was a lot of the information correct. Many of the responses were unclear as to what the participant wanted to know.
Did you learn that RIAA EQ is a 12 db boost on recording and a complementary cut on playback?
Did you learn that the 40 dB curve we are accustomed to seeing is RIAA plus magnetic cartridge EQ?