Puritan vs IsoTek vs inakustik

I have had the exact opposite experience of @zlone. When I removed the P15 and introduced the Puritan, I couldn't believe the impact. Everything got better, making me feel like the P15 was doing nothing.

@lancelock Wow, interesting. Makes me think even more that I may have had a faulty unit. The impact of the P15 was subtle to be sure, definitely not a wow factor. But I think I have pretty good power to start, and it just gives me consistency.

Puritan reduces noise by active filtering. With it though comes restricted current delivery and pinched dynamics. And no it’s not non current limiting. It puked when I connected my Pass Labs mono blocks to it and started ringing like your grandma’s old rotary phone.
 

The initial illusion of reduced noise floor by excessive filtering overwhelms all other effects and it takes time to realize that it does more harm than good. Live with it for a while then remove it completely and run everything direct. If you prefer the sound with puritan may be you have a very dirty AC line or your components power supplies are not up to snuff. None of my components benefited from it. Not even a DAC.
I couldn’t get rid of it fast enough. 

I use 2 Puritan PSM 156. One on each dedicated line. One on all front-end and source components. One one amps and subs. Been very positive for me.

I use the Puritan only for source components. My power amps always go directly to the wall, with a dedicated line to the panel.