| Wide Spread RIAA Phono Stage Inaccuracies by Manufacturers [message #95102] |
Fri, 21 January 2022 15:44  |
positron
Messages: 106
Registered: May 2020
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Viscount |
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Hi Gents,
I finally found the AES article covering RIAA equalization by Stanley Lipshitz I lost many moons ago. According to the article, there is a problem with correct RIAA equalization design in phono stages. (I am wondering about recording as well.)
No need for math etc, the introduction and references 1-18 at the end of the article give a sense of the scope of the problem. Who knows who is really following the true RIAA curve to this day?
https://forums.melaudia.net/attachment.php?aid=1301
Interestingly, the computer program I used for designing the RIAA in my test phono stage was up to 0,7 db off in the highs and 0,3 db off in the bass. After correcting the problems, a definite sonic improvement. Of course I had to reset the TT tracking, rake angle, anti skate etc.
For those who diy, here is a website whose calculator is based on Stanley Lipshitz's design equations.
http://www.mh-audio.nl/Calculators/CalculateRIAA.html
cheers
pos
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