iFi AC iPurifier


One of these arrived yesterday.  Nicely made, though the lights and lettering on the end are not exactly horizontal when it's plugged in.

Tried some initial tests, plugging it into the spare socket on the duplex in the wall, and various spare sockets on the power strip.  With the system on but no music, and with music playing, I could hear no change whatsoever with it plugged in or not.

After a couple of hours I noticed that the flat end of the cylinder was getting quite warm to the touch.  The unit came with a soft plastic white plug in the earth hole, and I assumed it was there to stop dirt getting in.  Nothing about the plug/bung at all in the instructions, and not featured in any of the photos of the thing.  I removed it, and it definitely seemed to cool down.

Will persevere some more, but with the AC that I'm dealing with, it seems that results will be, at best, subtle.

128x128twoleftears
I have one plugged into each of my dedicated lines at the wall. I noticed a significant increase in detail, space and bass extension/definition in a system that has fairly heroic ac conditioning, including a brace of QV2s and a QK1. They work for me, but like anything audio, YMMV. Good luck!
Worked well for me: increase in clarity and dynamics, no shift in tonality. I bought some more.
I discovered this gadget yesterday. After some experiments I'm a believer! Bought one already and maybe will buy more in the future. 
It works especially well with digital devices. I have it plugged on the power bar where my class D monoblocks are connected, together with CD player, computer and DAC. The difference is not huge, but clearly audible. Everything now is more clear, less blurred. 
But I must say that among some trials at the shop, it didn't show the same results for every system we tried. It seems the final result is system-dependent.