As others said the regenerator (P300) has limitations. It is best used on your front end. I use one on my CDP and phono pre, my linestage is passive. I will never get rid of it! I am stunned with its results on my CDP's (MF Trivista) fidelity and image. I use it in the 120hz output mode. If I lose power at home it will reset to 60hz. I usually spot this (if I wasn't already aware the power went out by seeing "PF" on the microwave) within a minute of listening. It makes a big difference. Find a dealer that loans before you buy and decide for yourself. There are other things like the Ultimate outlet for power amps. Richard Gray stuff comes to mind. Good luck!
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