How to check RIAA EQ Accuracy of a Phono Stage

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Using a signal generator and calibrated mic for a smartphone I was able to check the accuracy of RIAA equalization of 2 phono stages - phono stage of Elekit TU-8500 preamp and Sunvalley SV-EQ1616D phono equalizer.
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Thank you Raymond for an excellent presentation! I ordered the Sun Valley preamp (assembled) yesterday via Victor Kung and look forward to matching it with my Bob’s Devices Sky 40 SUT. Glad to know it’s within spec for the RIAA curve.

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Where to buy this adjustable phono stage RIAA circuit?

alfafan
visit shbcf.ru