Phono Input - Inverse RIAA frequency response

[Tranquility Bass]

Introduction:

The Ultimate Preamplifier features a magnetic cartridge input that also incorporates the requisite inverse RIAA equalization curve. The phono amplification stage is a hybrid design and is a mixture of both analog and digital gain cells along with the inverse RIAA curve implemented in the digital domain exclusively by the DSP. This makes its frequency response extremely accurate to within 0.1dB with no inherent drift over time. What we are looking at when we measure the frequency response of the Phono stage should look something like this from  WikiPedia .



Conclusions:

The frequency response measurement of both channels of the Inverse RIAA response as implemented in the Ultimate Preamplifier shows a text book response with both channels displaying identical responses as you would expect from the accuracy of the digital domain

[Tranquility Bass]

Both channels overlayed on top of each other shows the accuracy of the digital domain !!