AB testing of power regenerators?? Ever do it?

I did some quick A/B testing between my older PS Audio Power Plant P5 and the Bryston BIT-15 which is based on a balanced power transformer (it's mostly a rebadged Torus design I think). In my system the Bryston offered noticeable improvement in dynamics and background blackness, with no down sides at all.

Now I have a Puritan PSM156 on the way to see if that is even better, or if I should stick with the Bryston. 

I imagine this is really dependent on the power situation in your town and your particular home as well. That probably explains why there is so many completely different opinions on the topic. 

I’ve done A/B testing over the years with various amps. Some benefited greatly, some didn’t. It depends on how tolerant the power supply is to poor quality power. Now I just use it for all my components and don’t worry about it.

Jerry

PS  the power at my house has consistently 2-4% distortion.  the output of the regenerator is .1%,

@carlsbad2  how are you measuring distortion of your electricity??

I would like to think that regenerator improves a system but in all fairness most people have electricity sources that do not require it. And therefore it appears to be in most cases a gimmick.

Don’t see Power regenerators at audio shows very often, which is where it clearly should be if there was value in the device with all the Power activity going on with all the related to audio systems. Do see a lot of power conditioners obviously. And based upon response to this thread it would seem many do not know what the before and after impact is.

If it does have a meaningful impact on the system I would be interested but there’s limited support to justify getting one.