There is no such thing as a dedicated line. It all goes back to the same place. As far as current draw is concerned, your circuit breaker is going to trip long before you overload the line. As far as noise is concerned, any decent power supply will filter it out. That is what it does for a living, filter out AC, any AC.
All this business with "power conditioning" is lay instinct run amok. Replacing my entire system would cost just shy of $100,000.00. All I use is one 10 socket power strip for the front end and two separate 20 amp lines for 4 power amplifiers totaling 4000 watts of power. Most of the units are using their stock power cords others I made myself. I tried a power conditioner way back. All it did was take up space.
All this business with "power conditioning" is lay instinct run amok. Replacing my entire system would cost just shy of $100,000.00. All I use is one 10 socket power strip for the front end and two separate 20 amp lines for 4 power amplifiers totaling 4000 watts of power. Most of the units are using their stock power cords others I made myself. I tried a power conditioner way back. All it did was take up space.