Who Tried Power Conditioners Over The Years and No Longer Use Them Today, Any Why?

@wrm57 Yes not sure I would need the AQ5000 only have 5 components and AH X200 is not that huge of a power hogg.

I got a Furman Elite many years ago, and I always miss it when it's out of the system. 

Trip lite 2400s I have a few. Slight mechanical noise problems.. All fixed.
I installed 20 amp detachable PCs and removed all the wire nuts and added crush connectors with serious pressure (cold weld) copper butt connectors. Copper Hubble outlets with contact enhancer..

Took off one super high frequency ferrite ring...  I added a copper grounding lug with 12 1/4" holes drilled. You just tighten the bonding screw to bond to the chassis or use is as a common bond for noise reduction.. Works pretty good 1/4 x 1/4" male mic cable works perfect.

I'll give mine up when power company provides one for my house. I doubt they much care about quality of power delivered to my house. I suffered with 123-126 constant voltage delivery for years, finally had to build bucking transformer so my audio equipment's transformers wouldn't hum me out of listening room. And possible damage to insulation on those transformer windings, you think they care. 

And then we have all these modern electronic gadgets in our homes and neighbor's homes with noisy switching power supplies. I have all the dedicated lines, high end ac outlets and power cords. These don't clean even your own home generated ac. Try using a hair dryer or dimmer switch on incandescent lights in your home while system is idling, even with the dedicated lines I can hear this crap.

Keeping up on the audio literature I realize that some people have power that does not need conditioning. I have never been one of those. I now have two direct lines for my system, one for my amp and one for my power conditioner which powers the rest of my equipment. Each of these has made a significant improvement in sound. So I occasionally try my system without a power conditioner (when I make a change). Last time was a few months ago… I put in a Cardas power strip and took out my Cinepro Power conditioner (75 lbs… although 20 years old,was very highly rated). That test lasted less than a minute. The sound became flatter with a much higher noise floor. Over the years the SQ for me has always been wat better with power conditioning.

High power cords make a huge difference. That is the reason there is such a huge aftermarket. If you want a really great sounding system, well chosen high end power cords are required… just like interconnects and cables.