AC POWER DISTRIBUTOR/POWER CABLE VERSUS DEDICATED

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.

Both! Any current draw on a shared circuit, will cause a voltage drop, to one degree or another. The smaller the wire gauge and/or higher the current draw, the greater the voltage drop. Some noise from other devices, can still be transmitted through your panel's neutral and ground buss bar, which are shared by all branches. A dedicated circuit will help with the first issue, a good power purifier or regenerator, the second. Personally- installing a twisted, double run of 10 AWG Romex, to my listening room's outlets made a dramatic improvement. Already had my Stealth XXX.

A dedicated 20 amp (2400 watts) circuit is more than enough for
anything you would ever use. A 30 amp outlet is for a clothes
dryer or hot water heater with a different type of plug that no
component cord would even fit . So yes ,you are better off
spending the money on a dedicated circuit than a power
distributor !