It will not surprise many to know that the avoidance of loop negative feedback is the key to this design. Having established a design, the components used were individually selected by extensive and laborious listening test. A discrete design allowed that as each component can be hand picked to get the optimum result. Every component on the design was individually chosen, as was the grounding paths.
Resonance and Vibration Control
With all the emphasis on reducing noise from the power supply coming into the amplifier, it makes no sense if the amplifier itself creates vibration or generates radio frequency interference and
There is no way to eliminate hum and vibration from the transformer. This is because even for the
For example, a single switched mode power supply in the same electrical circuit as the transformer will cause asymmetric compression of the power waveform. Moreover,
A phenomenon that we noted in the design of the transformer is that when the coils are wound so that the transformer does not emit an audible hum, the transformer will vibrate and heat up even more. It is intuitive that the incoming sine wave needs to be dissipated in some way – in the form of sound, heat, or vibration.
With the transformer moved outside of the chassis, the Genesis Reference Amplifier has a much quieter environment in which to operate. To further reduce the vibration/resonance within the chassis, the signal and power circuits are isolated from each other. The signal circuits are softy “hung” using a neoprene “hammock” from the top cover of the chassis, while the power circuits are stiffly mounted on the bottom plate using plastic posts.
This choice of differently compliant mounting is because of the different susceptibility of the two different circuits to different frequencies of vibration and resonance.
Genesis Reference Amplifier Owners Manual Ver 2.0 | 12 |
