Dedicated power

Thinking back, these are some of the problems that caused power problems:

• squirrels nearly chewed through the bare aluminum neutral. Apparently, they love it for sharpening their teeth.
• both a recording studio and a mastering lab had issues from underground transformers that got wet over several years and eventually became unbalanced.
• pole transformer failure severely unbalanced 120v legs.
• this was a toughy: one of the load balancing transformers the DWP switched in at times was defective in combination with some others. I called DWP, but of course It’s all good here. Must be your end. I logged power and voltage for about a month and gave them specific times, loads and voltages. When they compared with their switching logs, they were able to identify the faulty unit. Once replaced, no more issues.
• etc.

From the HCA-3500 owner's manual:
"Power Requirements 110 Vac-120 Vac 1200 watts per channel"

Seems pretty simple to me.

I = P/E
I = amps (the great debate)
P = watts (1200)
E = Volts (120)

After doing the math, the above statement can be re-written:
"Power Requirements 110 Vac-120 Vac 10 amps per channel"

Note that the requirement is not conditional. No "continuous" or "peak" modifier. Just a simple statement. Yet, it's amazing how many people will think, "well, if 20 is what the manufacturer recommends, 30 must be better!"

Parasound puts that in their literature for a reason. That's what the amp needs. That's all. No more.

And I can pretty much guarantee that there is no statement anywhere from Parasound that even hints at running a 30 amp circuit. Because if they did, Parasound then becomes involved in what happens next.

Anyone who runs a 30 amp circuit to a 20 amp duplex is an irresponsible fool and creating a fire hazard. 30 amp duplex plugs don't exist for a reason: to prevent someone from doing something stupid like this. So, after their house burns down because they ran too much power to a circuit that wasn't designed for it, the Fire Marshall is going to go to their insurance company and explain what the cause of the fire was. The insurance company is then going to say to the homeowner, "Son, you're on your own."

So, the bottom line: Do Not run a 30 amp circuit for something that was not designed for it.

Bob carver designed power supplies can be a bit different than most other stuff on the market, so Jea48 you might be onto something with that theory.

ieales"both a recording studio and a mastering lab had issues from underground transformers"
I have never heard of such a thing are these  transformers between substation and end user is that allowed in your country?