There is three-phase scheme of electric supply on Spivaki records.
Power supply is fulfilled by means of private transformer substation with 40 kw of capacity.
Computers and studio devices are networked to individual phase of transformer.
This is "clear network" is just for soundrecording equipment.
Illumination and common wall outlets are powered by "common network" of other phases of tansformer.
So, noise are impossible.
There were delivered crossover and amplifiers NevaAudio Studio II, we started to assemble monitors of distant fields.
photo by Sergiy Dedishchev