Whats a good economical way to test the electricity on a circuit?

Almost forgot! There is one free and very simple test you can perform to hear for yourself just how much noise there is in your AC. Get your system nicely warmed up. Listen to your favorite music. Go to your panel, flip off as many circuit breakers as you can. Ideally everything but what's needed for the system, but for sure do water heater, stove, refrigerator, spare rooms, stuff like that. Go back and play that same music again. The huge improvement you just heard- blacker background, clearer details, improved dynamics, with less grain and glare - is all due to the reduction in noise from separating the system from all those other circuits. You will hear it. And once you do, you will understand why you do not need no meter. Because you have something better: ears. 

Go and listen. You will see.

I get what your all saying.. makes sense.. and not sure if im coming off nutty but i am pretty relaxed.. just wanted to play around with some measurements.. especially to see how well these PC, conditioners, etc are working.. Thinking of putting a dedicated line in.. aside from ears.. but just wanted to play around with the idea.. so if i shut off everything.. except breaker line to audio system.. that would get the same results as a dedicated line?

Now that you know your VAC is "Dirty", what you gonna do about it?

I have a good supply, very seldom have outages, very seldom have brownouts, and we haven't had spikes or over voltage for over 30 years.
PG&E went from 8k lines to 20k lines, 35 years ago. A lot of problems went away. Constant Power supplies issues, all around us.

PC especially use to lose their power supplies. One in maybe in 30 years now, from 1 a year. You had to run a PS backup, if you were running a server...

We have smart meters, now too. There is a lot more information there than you might think..

What do you as an owner of expensive equipment, do to protect your gear?

I use something that maintains, the voltage at 120 VAC on the button.
Surge protection, filters above 40 khz, and 20khz. Good copper inlets and outlets on the device. The lowest noise level I can achieve (hum). The quickest response time in the event there is a problem.

There is a few more features, but maintaining the voltage, is one of the best things you can do to increase gear life. Mine cost 300.00 usd or close, and about 6-10 dollars in stuff to quiet the mechanical hum, to practically zip...

Regards

For one.. I never tested anything to see what the condition on my circuitry is.. My neighborhood lucky enough doesnt have any smart meters yet... i know smart meters can go a long distance. But the point is.. if I can test my home... then maybe I can see what is causing my lines to get.. dirty or whatever.. or measure in my house what devices are giving off the most interference, etc.. not sure why finding a cheap meter to get an idea is such a big deal. At the moment im using a Shunyata Hydra 6 conditioner, and a mixture of Shunyata and Silnote Power cords, and a ADD-POWR SYMPHONY PRO EMF Conditioner. They all have made a difference in each step. 

But one thing you mentioned would really help. If I shut off everything in my house.. except the line to my audio system.. would that be comparable to getting a dedicated line?