Hmm i see, so it doesn't do anything at all to mains power, emi/rfi, common mode noise etc?I briefly tested one. It had no effect whatsoever on performance of a Dac. It does get warm and wasted power however.
I do get some rare buzz/humming sound when the dimmers are used, do you thing it will help then?It probably does do something about EMI/RFI, common mode noise etc.
That does not mean this has audible consequences and that measurements/performance is 'improved'.
Amir mentioned it did not have any influence on the performance which is very, very likely.
That does not mean the connected gear did not receive 'cleaner' power.
The tested device just had more than sufficient PSRR and works equally well on 'normal' mains power as on 'clean power'.
In MOST cases audioequipment is designed so it is at least tolerant to FCC/EMC rules and the rest of the equipment in the house is too.
Provided the equipement is used and connected as prescribed.
This is easily measured but NOT with the AP with standard audio tests.
I some cases ground loops can cause garbage to enter the audio path and reach audible or detectable levels.
Hmm my country's power network doesn't really have polarity (Norway) I believe they run it balanced with 120v on each leg for 240vac.The best thing to do would be to address the origin of the generated mains crap.
Dimmers and FL or cheap Chinese LED ligthing can be sources of huge mains polution.
Equipment SHOULD be immune to this.
This means one should use a dimmer with a better mains filter (some only have a common mode coil) or filter the wires to and from the dimmer as close as possible to the dimmer.
The ifi device appears to be a MOV (over voltage protection device) that can limit overvoltage.
Combined with a capacitor + lower voltage MOV's (Voltage Dependent Resistors) so it could lower crap on the mains by dissipating it in 'heat'.
It also has some fancy LED's with associated electronics to let them light up.
It won't filter crap < 10kHz anyway so all audible range 'crap' is not addressed anyway.
It is possible that some of your audio equipement may not be connected 'correctly' to mains.
Try this before you invest in all types of devices. maybe this could already solve the issues. If not one needs to look further.
The conditioning part measures the noise in your AC line and injects it back counter-phase to null it. Plus test LEDS, overvoltage protection and fancy grounding features.
One would normally call that a 100:1 transformer.
So that opposite Phase Cancel they tout is BS?Yes I know...
one big 470V MOV (Varistor that clamps at 775V) in series with a fuse and some 2kV capacitors.
A capacitor that supplies DC voltage to some LED's and the ground current detector (no idea what that could do other than let an LED light up).
Nothing high-tech fighter yet stuff.
And does it even do anything, I'm considering buying it if it actually does clean up the mains power from dimmer, refrigerators etc.
It would really amazing if they accurately use phase cancelling at those frequencies.So that opposite Phase Cancel they tout is BS?
Phase cancellation can work to many GHz but I have no idea exactly what this thing does and have not read their description (long day, just home and practiced a bit after dealing with a dead car battery on the way home )... I can think of several ways to suppress noise but wouldn't bother as most power supplies do just fine on their own. I suspect the actual noise suppression is not that flat to 100+ MHz but too many unknowns, including just how high a noise level it can handle. At its simplest, you just need a wideband unity-gain inverter, so a few transistors will do it. I built a circuit like that in the primordial past to suppress dimmer noise, but naturally all I learned was the noise was radiated and not coming over the power lines, something I should have known without wasting time on a fancy active suppressor circuit (that was definitely not UL-approved at the time!) It was a fun project based on a simple idea that worked OK (though was not designed for >10 MHz).
Anyone have a schematic?
FWIW, my current day job deals with 10+ GHz signals and sub-ps jitter. I no longer do mW/mmW stuff; most of the harmonics are dead somewhere over 20 GHz though we characterize to 40 GHz just to CYA and because some specs require it. Still, higher than most audiophiles can hear, and than most speakers can reproduce.