Game Changing Tweak

Eau4 has twice the antennae and therefore a larger field. AddPowr is not stripping away anything. I got both Furutech and add powr. I use the Furutech on my Isotek vision power scrubber and the Eau2 on the router. Try the Furutech on the router maybe. Eau2 or Eau4 work.

For a 10 plug-in comparison, go to "Live plug-in filter test" at YouTube. Doesn't include Electraclear, Puron or Stein, but many others available in the U.S. Disturbing result with Clear Line (no. 7 in the test and measurements at the end).

+1 for the Eau4! Bought one initially for my OLED TV to see if it made any differences(s) and indeed it did. After about 10-12 days, better color saturation and darker blacks. What I dd not expect however, was the impact it had on my stereo system which is on a separate line but fairly close to my TV. 

My system became quieter, especially in phono mode. I was so intrigued that I ordered a second one and plugged it into an outlet with my stereo and the noise floor was further lowered to a level that I can no longer detect any noise. Prior to inserting these devices, I could always detect a very slight hum in phono mode  (behind my speakers) when I stopped playing a record. With my system off, the hum would disappear. Now, I can't hear any difference in the hum level when my system is on or off. Color me most impressed!

With the reduced noise levels, my stereo sounds more dynamic, has improved imaging and sounds a bit warmer since I am more aware (in a good way) of the tubes in my system.

The company offers a 30-day return policy, so you really don't have anything to lose, except for the time and effort it would take to actually audition the device...before passing judgement. I realize that for some, the later comes much easier.

@grk 

I’m the OP of this thread. Congratulations on thinking for yourself and trusting your own ears. You’ve corroborated my own experience that AddPowr’s products are a powerful addition to ANY audio system. I also wrote a follow-up about plugging them into an isolation transformer along with a power conditioner so that every component downstream of the isolation transformer is treated to the same miraculous improvement. My ElectraClears were the original iteration of the technology and your Eau4’s are a doubling of the ElectraClear’s effect, so you did well.   
   Why this obsession with the seemingly infinite ways to improve one’s system? 
Psychologically, I’m creating a private cocoon of aural pleasure that blocks the incessant and irritating intrusion of the outside world. A great sound system is an aural womb, and harkens back to the most perfect and accommodating environment one has ever known- floating in a bath of amniotic fluid. AddPowr’s devices bring you back there.