Dedicated Circuits - Subpanel importance?

The backstory here, which I may have mentioned in another thread, is that I learned "the hard way" of how important a dedicated line may be. My system was sounding pretty good, but I was listening alone during the day and at night. My brother visited twice and loved what he heard. My point - my system was the only thing using electricity during these times, something I didn’t realized until last Thanksgiving when we had a houseful of guests (as did the neighbors) and my brother said to everyone "you have to hear xxxx’s system". Practically every light, television, Christmas lights and tree were on at the time and a number of us headed down. The SQ was atrocious. Embarrassing! My brother walked out blaming my gear and exclaiming "what a waste of money"... A total disaster I want to avoid or greatly mitigate in my next system.

Consider a Furman with LiFT and SMP.  Living in an apartment until recently I always could hear when the Furman was missing from the system.

Before you go to pull a permit for the electrical, you need to know IF you, the homeowner, can legally do the electrical work in your state.If not, you cannot even get the permit. Some states require a licensed electrician to do any and all work. I know the state of MD used to be that way. Don't know what other states have the same rules. I'll leave it at that

A sub panel is great for adding shorter runs. It add 220/240 if you want. I use it on my bass amps.

Romex is for running on it’s own. No conduit. There is flex armor that meet code in the bay area.

# 10 is great for a subpanel feed

# 12 for 20 amp circuits

# 14 for 15 amp circuits

Use copper not clad they sell that crap everywhere. COPPER, not cryo anything just Copper romex or if your going to use conduit use the correct wire for inside conduit or Flex armor. BTW a lot of the new flex armor is aluminum with copper clad..

ALL grounds must be tied at the main

Any breaks in runs must be put in a box

ALL boxes must have a 2 hour fire rating

It’s actually easier for me to run the wire in the wall after it’s all said and done. You just have to ask someone that knows how to string wire without tearing up the whole house. It usually involves a couple of fancy drill bits and just a little patience. Time wise there is an increase but only because of drywall mud setting. I’ve used hot set mud and only had to primer and paint, still a 2 day wait.

PERMITS: Permits mean you bought permits and paid for something. It doesn’t mean you got anything for your money. The home, building or any thing else could burn down and take out half the neighborhood and the inspector is responsible for absolutely nothing other than looking (if they do at all) and signing the little box. My neighbors house was worked on by a contractor, signed off on by the city and caught fire within a year.. THREE issues all via inspection after the fire. All boo boos, caused an electric mickey mouse clock to burn the joint up. You can get a loan easier for selling or buying if you use OPM, I don’t. Pretty simple.

Sell a house or buying one, I pay cash. I buy "AS IS" I sell " AS IS". I have for 50 years and 22 pieces of property. Same goes for most of the people I deal with, unless I carry the paper or something.. We both shake hand call each other suckers and wait until the next time we meet.

Regards

No sub panel needed, although doesn't hurt. Grounding is perhaps most important aspect, grounding rods, no cold water pipe grounding. I also individually ground all my dedicated circuits, exact same ground wire length so no potential issues.