power conditioner

Start with buying 1 PS Audio Noise Harvester ( $75 form Music Direct
or 2 for $100 )  , if the light blinks anytime other than when your 
heating/air conditioning is running then consider a power conditioner,
if it doesn't blink then you have fairly clean power , seeing will help you decide before you go out and spend a bunch of $.
A dedicated line is only good if you have a high current drawing amp ,
noise from anywhere in the house will still be on your dedicated line.

Have had Shunyata Hydras and PS Audio re conditioners.
Then I tried Equitech. Wow! Whole different ballgame.
There are other less expensive balanced power choices out there.
And if you are patient used Equitech shows up from time to time.
Equitech made my setup immediately sound like I had paid twice as much for it.
So I had to put one on each of my systems. Now have 2RQ, 1.5R, 2R and 3RQ.
The way it drops the noise floor is like your car stereo while you are driving and then you come to a stop. All of a sudden you can actually hear the music. And it does it without damping the dynamics like other conditioner types. Just my 0.02.

I used a Volume Increasing conditioner on my hair and it made it too loud. 

I have a Running Springs Haley and it made a huge difference. 6 outlets and amp, preamp, everything plugged in. I upgraded the power cord that came with it.

Oh no, Wolf say it isn't so... now you are starting to sound like geoffkait!