Audio Analogue SRL BELLINI manual FFT Spectrum Analysis at Volume maximum

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FFT Spectrum Analysis at Volume maximum

As you can see in the graphics the 50Hz component have been reduced to -120dB. Probably that value is due much more to the influence the cables (a standard RCA ones) get fron the environment. So we can expect the preamplifier to have an even lower 50Hz component.

Bellini preamplifier – Virtual Battery off line pow er supply 5 / 5