AC POWER DISTRIBUTOR/POWER CABLE VERSUS DEDICATED

For a foundational approach, best to install the dedicated circuit. The power distributors seem like a glorified power strip in a box that add only outlets, not more ampacity. How big is your system in total wattage? A 15-amp circuit won't supply more than 1800 watts--would have to dedicate that to the system--no other devices or appliances on that circuit. Best to install two 20 amp dedicated for a bigger system that can perform a lot of work. Not sure if one 30-amp circuit is advised. That seems more useful in a 240V line, which is what I use but must have a 240V/120V transformer with outlets that can serve all your components--see Torus and other brands for that.

What kind of equipment do you have that requires a 30A line? That's unusually high for home use.

Installing two 20 amp dedicated lines is a good way to go. If you currently have a small system, plan for the future. Also, it's advisable to run digital components on a separate line than the analogue.

The next step in a power upgrade is a power conditioner, which will help remove AC line noise coming into the house from the power grid. But most importantly is installing a dedicated line.