Do power conditioners help with unwanted hum/noise

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.

I have an all-tube system and have had a slight hum for about a year.  If I plug the amps directly into the SR orange Duplex outlet boxes the hum is louder.  If I plug the amps direct to my InaKustic 3500P PC the hum is there but not as prevalent.  It does not affect my sound quality but it is annoying because I know that it is there.  BTW, I have a dedicated 20amp line.  My next step is to plug a 2 prong adapter (no ground) into my MIT power cables to see if that changes anything.  

Thoughts?  

Good idea