Clean AC power

nonoise, what specific methods and/or gear are you using to clean up the power? Thanks.
 

@ vgizzi

The majority of "dirty power" in the home is created by electrical usage items found in the home.

Examples;
LED lighting.
Electronic ballasts/florescent lighting.
Light dimmers.
Switched mode power supplies.
Appliance/equipment micro processors.
Computers.
Air handler VFD (Variable Frequency Drive).
Switching on and switching off of electrical motors.
Hair dryers.
Excessive unbalanced 120V loads on the electrical service.
Loose and or corroded electrical connections. ( can/will cause excessive harmonic distortion on the mains.   
Last but not least, audio equipment.

Recently bought a Puritan Audio 156. Major improvement. As oregonpapa said, easily heard, but easily measured with my EMI meter.

What measurements did you get, with and without conditioning?

@hickamore,
I'm using a Audioquest Niagara 1200 power conditioner.  A basic unit with no regeneration. My gear is humbly comprised of a Marantz PM-15S2b integrated and matching SA15-S2b SACD player along with an older model Marantz tuner, my OPPO 103 blu ray player, cable box. TV and a soundbar. 

The sound just got calmer, has a quieter background, there's more see-through, better air and extension in the highs on down to the lows, lost that nervous edge on some music along with some shrillness, etc.

@vgizzi ,
I didn't take any noise measurements; only AC volts which ranged from lows of 118 to highs of 120.4 at any given time of day. At least I knew it was stable despite being an old building. I never took any reading after getting the power conditioner.

All the best,
Nonoise