THE GAIN
Each of the 24 gain stages has a fixed gain of 40dB. Caused by the double balanced architecture the overall gain is 6dB higher
for each gain block consisting of 12 gain stages. The complete gain without equalizer is therefore 92dB. Depending on the
different attenuation caused by the equalizing network the gain related to 1kHz is between 72dB for the RIAA und roughly
78dB for the other equalizer settings. Each gain stage has its own DC servo, to avoid that the DC servo affects the accuracy of
the equalizing network. That means each channel consist of 48 low noise amplifier plus 8 additional extreme low noise
voltage regulators, which are arrange in a point of load regulation architecture.
THE EQUALIZATION
The very high accurate equalization curves are calculated with the help of the Laplace operator and the results are
transferred as a look-up table to the audio analyser to measure each device in the correct way. The following graphs show
the inverse response of the respective equalizer.
Important note:
The equalization FFRR, Columbia and EMI are only for MONO micro groove recordings done before 1957.
All stereo recordings have to be played with the RIAA equalizer.
