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.

Dedicated line only means that none of your other household appliances are directly connected to the power going to your stereo/home theater equipment. It does not mean the other appliances like hvac equipment, refrigerators, charging stations for phones and tablets and the like getting power from the same breaker panel cannot dirty that dedicated line you paid extra to install when they are turn on. So conditioners and cables will still help control interference from other sources.