In my best knowledge there's possibility to convert AC Grid energy step down to multiple AC branches, then make it direct currents. Boost them by DC Boosters (higher the voltage mostly i.e. by voltage triplers), then make it AC back by DC/AC inverters, then transform this kind of signal by few step up transformers - could be normal grid transformers reversed and connect it to main trafo. This should work as a self sustain device with groundingg or neutral. I would call this device Maquina total. I will make drawings of what I am tinking.
This means an amplifier may be use as double inverters of current.
One of the inverter (left channel) drives an transformer that drives main transformer (!). Still, the energy won't last long. So neutral is energized for this.
But the second channel energize (not directly) the power supply, so in the output transformer is enough energy.
I am near to achieve the right voltage with my idea of a high turns coil, but sadly I don't get the right solution on transistor. Then I proposed the voltage tripler to achieve any weak current to drive the supply.
Sorry, but presented remake has several errors on inputs and outputs. I cannot give any guarantee presented block schematic would work.
Paulos idea is simple. Adding GND cable, step-up transformer (left channel), wounding noplis and 5000 turns (200mH-1H) coil closed by RC to minus and then doubled or tripled by Diode-Capacitor giving 15-50V to energize Power Supply (right channel). Simple circuit. Very often Neutral Energy is utilized then if connected after start. This attached file is a real jazz and can put you astray from achieving free energy.
In the last year I gave many addons solutions which may boost typical power into next level. Still I urge to choose the right RLC parametres or reverse transistor pinouts. And this is rather for advanced electronics/electricians.
I made several updates and bonus descriptions in two languages. This way the Paulos System topic is closed by me. I will try to hold original files on 4shared and chomikuj servers as long as I can. My projects are open source (common creative) that's why I understand other are trying their philosophy for audio stuff remakes. But I cannot take responsibility for their ideas.