My listening room is a remodel from about 1991. My electrician father in law insisted there is no reason for a separate circuit or line and so the room was initially wired just like yours. Then over the years I have redone it a couple different times including yes rolling the 4 ga wire into a pillow case and having it cryo'd. As a result I know from experience what several different methods actually sound like, how they perform for the money.
The biggest, best, most obvious and cheapest improvement is simply to replace the standard daisy-chain of outlets with one dedicated line running direct and unbroken from the box to your outlet. This one thing alone will make a difference you will easily hear and for very little cost.
This works because each connection in the chain is a point of micro-arcing, eddy currents, and RFI entry. It does no good to unplug stuff, the connections themselves are the problem. Remember this for later.
If you can do it with thicker wire so much the better but then you run into problems with electricians and electrical code. For example if you run 4ga that will require a sub panel or some sort of step-down box, and you will just about have to do it anyway simply because that wire is so darn thick. But now remember connections are the problem? So your box just added a whole slew of connections.
If you are going to add connections then make it worth your while. Run 240V to a quality step down transformer located close to your system. This is what I do. This is another big improvement but unlike the first one this one costs real money.
If you want to go the Full Monty I would skip right past all the crazy expensive stuff and go full battery power. Like everything else this has to be done right. The benefit of batteries is they eliminate all the RFI and EMF riding on the line. In order for this to work however the system must be designed to be disconnected from the grid and running full battery isolation when playing music. It can be connected and charging the rest of the time but must be physically isolated otherwise.
I have heard the improvement running just one component off batteries. Based on that I would say if you do your whole system that way the results will be jaw-dropping and probably beyond the reach of any other method regardless of cost.
This experimentation of mine, it was all done back in the days before magical fuses and all the incredible advances in power cords, interconnects, speaker cables, isolation platforms like Podiums, and all the rest. Looking at it now there are so many much more beneficial uses for your time and money I would just run the one fat wire and call it good.
The biggest, best, most obvious and cheapest improvement is simply to replace the standard daisy-chain of outlets with one dedicated line running direct and unbroken from the box to your outlet. This one thing alone will make a difference you will easily hear and for very little cost.
This works because each connection in the chain is a point of micro-arcing, eddy currents, and RFI entry. It does no good to unplug stuff, the connections themselves are the problem. Remember this for later.
If you can do it with thicker wire so much the better but then you run into problems with electricians and electrical code. For example if you run 4ga that will require a sub panel or some sort of step-down box, and you will just about have to do it anyway simply because that wire is so darn thick. But now remember connections are the problem? So your box just added a whole slew of connections.
If you are going to add connections then make it worth your while. Run 240V to a quality step down transformer located close to your system. This is what I do. This is another big improvement but unlike the first one this one costs real money.
If you want to go the Full Monty I would skip right past all the crazy expensive stuff and go full battery power. Like everything else this has to be done right. The benefit of batteries is they eliminate all the RFI and EMF riding on the line. In order for this to work however the system must be designed to be disconnected from the grid and running full battery isolation when playing music. It can be connected and charging the rest of the time but must be physically isolated otherwise.
I have heard the improvement running just one component off batteries. Based on that I would say if you do your whole system that way the results will be jaw-dropping and probably beyond the reach of any other method regardless of cost.
This experimentation of mine, it was all done back in the days before magical fuses and all the incredible advances in power cords, interconnects, speaker cables, isolation platforms like Podiums, and all the rest. Looking at it now there are so many much more beneficial uses for your time and money I would just run the one fat wire and call it good.
