Do power conditioners help with unwanted hum/noise

Thanks for the help, Sean, very much. I think I can go ahead and buy a transformer, thanks to you.

Sean, which is better, isolation transformer or choke regulated power supply like Musical Fidelity?
Thanks,

Cdc: Each of these are different designs with different outcomes. A choke regulated supply should lower the noise floor and provide less ripple ( voltage fluctuation ). The isolation transformer won't do anything in terms of reducing ripple, but it should lower the noise floor to a measurably greater extent. That is, in terms of how most chokes are used in most power supply designs. Given that i prefer to run the Iso at the breaker box / out of the listening area and the other approach is actually built into the gear, one could actually use both with compounded benefits. Sean
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Thanks Sean, the iso transformer would be an easier upgrade. I used it on the CDP for the biggest improvement but always wondered how it compared to choke regulated p-s.

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.