Do power conditioners help with unwanted hum/noise

I had the same exact problem on my system. I was able to do it by simply puting a 2 prong to 3 prong adaptor onto all of my power cords. This eliminates the ground loop on your house's circuit and if that is the source of the hum (which it most likely is) it will cure it completely. I went from almost unbearable hum to quiet as a desert.

You want bang for the buck. Go to Home Depot and purchase a Belkin AV Master for $75...that right...$75. I am using one with my Naim CDX...only Power Conditioner that totally gets out of the way...lets the dynamics come through...along with the detail. I stumbled into this when I tried it with a Roted 965LE, with miraculous results...I was all set to go for the HYDRA. The Belkin offers amazing bang for the buck...I now own two of them...an amazing product providing you don't believe you have to pay $1,000 for this kind of result.

Step 1 is to determine the source of the buz or noise. Is it a ground loop? Is it a noise generated by an external device like a dimmer or appliance? Is it DC on the line. Ground loops are heard through the speakers or subwoofer & DC is usually heard internally with buzzing transformers. From my experience, line conditioners or isolation transformers will do nothing to filter ground loops or DC on the line. Dedicated lines won't solve the problem either. Ground loops have to be solved at the source or top notch ground loop isolator has to be employed. DC is even more difficult to isolate and treat. Emotiva & iFi make excellent DC filters. I use the Emotiva for DC issue and for the ground loop I use the classic Mondial Magic Box. For a line conditioner, I have a Furman Ref It15 which has an isolation transformer built in and it does nothing to prevent ground loops or treat the DC issues. So my conclusion after a 3  year battle with a DC on AC  is no line conditioner will work to prevent those noises and you will need multiple specialised filters in addition to the line conditioner.

jb1-

The OP likely jumped out of a window if he had to endure 17 years of  hum.

Check out an older MIT Z Stabilizer 2. And an Equitech 2Q. Good luck.