@terry9 -
Yes. I have measured a.5 - .75 db increase |
"...that shows a frequency response of an amp's noise floor." i.e. no signal, full amp gain setting. |
Generally, audio power supplies do not filter noise under 40 kHz, no?
You can put all the LRCs you want on a DC power supply and as many farads as you want. I will say that you will not find many supplies filtering under 20 Hz.
Sure, make the AC as quiet as you can.
That will make the ElectraClear work even better.
Why not play with the medium of AC single phase 90 - 240 VAC and explore what how it can be exploited to do more.,,?
Why not explore what is possible using basic ideas of physics?
The medium is the message.
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@lostinseattle -
I was told that the pro audio world folks are the only group interested in such data. There is virtually no business there, and it is very difficult to break into and be profitable.
That low frequency signal is below 100 Hz I presume.
I think that they have some tests that were done by a tech at Harmon that there is spectrum graph looking at frequency versus noise floor of an amp. There were some interesting results, I'm told.
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@ladickinson - You say "low frequency AC harmonic". The signal in question is not related to the AC 50/60 Hz sine. I repeat - It is not an AC harmonic. There is no injection of an AC sine harmonic. Do you get it?
Rather, I suggest a low frequency signal, presumably a square wave, that is the result of signal processing circuit design, that is impressed upon the line. It is the square wave that is composed of a harmonic series of sine waves.
Not "absurd" imo.
I stand by my statement of power supply filtering in audio gear.
I didn't say that a power supply cannot filter low frequencies.
It appears you are locked into a fixed position of intellectual judgment and therefore dismiss any idea that disagrees with your intellect.
On an another note, it is up to the manufacturer /designer to reveal the complete recipe of its unique "sauce." |
Imo ADD-Powr is not snake oil. There's nothing wrong in trying to coin a catchy marketing phrase.
It has nothing to do with quantum mechanics, nor any ooga-booga / snake oil devices.
It has everything to do with science.
Read the "about" page and then comment.
Apparently Bill, the designer of QRT, did indeed, use the word "quantum" to simply blow people's minds away in order to get attention and create a faithful following - and it worked!
Not based on rational science but based upon subjective emotion.
At the end of the day, all the products worked as claimed. But a rational explanation was not a part of the recipe, an odd and disconcerting marketing approach to say the least.
So, "proprietary technology" was employed and that became the explanation.
From perusing the web site, ADD-Powr is appears to be about increasing "energy", or the voltage of the audio signal through the generation of harmonics on the reference supply that are too low in frequency to be filtered away by the component power supply. They more or less resonate with similar frequencies in the audio signal. If the fundamental signal is low enough, then its resonant affect will be evident throughout the audio band. The driving fundamental must be a complex function composed of sines and cosines in various phases - that is the Fourier series. Or...perhaps it can be simply be a square wave!
That explanation makes sense.
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There is no "bad" anything.
In fact,
The ADD-Powr idea is not about filtering noise.
It adds signal, and does not filter nor address noise.
Do you remember the term signal-to-noise ratio, or S/N?
If you increase S what happens to the ratio?
My math says the ratio gets larger.
Go get yourself a dB sound level meter.
Play pink noise or white noise into your system.
Send it as mono or stereo feed.
Take said meter locate and position and point it at:
1 - 2 feet from each speaker
Repeat from 5 feet.
Repeat from the sweet spot between speakers
Record the measurements.
Plug in an ElectraClear or any ADD-Powr product, and repeat the above.
End of story.
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"Honestly, the more I read this on this site the more it screams Snake Oil."
That only shows where you need to think more about the phenomenon because you have not examined it from other ways.
And you have not heard any of the ADD-Powr products.
You don't have any idea what you're talking about because the S/N doesn't lie and your ears don't lie either.
Just contact and ask the several pro audio engineers using the products. |
You're entitled to your opinion and you may think and believe what you wish. These are not fantasy stories and there are many things you and I don't know.
The ideas of resonance, harmonic series, and ideas of physics / electrical theory are worthy of scrutiny.
I sense that they are worthy endeavors to push the envelope of what is possible to achieve quality audio sound that allows you to derive more pleasure from recorded music.
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It has nothing to do with PF correction.
The approach you describe is not the approach here.
You are talking about phases of the AC line. That is not what ADD-Powr is doing.
Also, It's nothing to do with the peaks necessarily, but rather inducing an actual periodic pattern of very low voltage oscillating "bumps" on the line. It is kind of similar to how an old LED digital clock (very low frequency square wave perhaps) might affect the AC line.
Again, this is not about addressing power line issues per se.
It is an approach using a specific low frequency waveform signal type and resonating vis-a-vis its harmonic series, other signals whether the means is through the power supply or by a coil antennae. The essence is getting a harmonic series to resonate with like frequencies, |
@lostinseattle -
I'll try to explain it (ElectraClear) in general terms -
Consider the idea of a clock and dividing its rate or frequency into slower and slower rates. Now the clock has to be a fast rising edge, like a pulse, so as to trigger the dividing process. The outputs are square wave signals. What is a square wave? If you look up Fourier and his discovery of harmonics and transforms, you will learn that they are comprised of sine/cosine waves of a variety of related harmonics to the fundamental.
I presume that there is a situation that mirrors or reflects the pulsing action of a square wave onto the AC line however minute that may be.
This mechanism eludes me.But it must be something in the semiconductor transistor output or the small em field generated that allows this transfer. Not sure here.
Accepting this -
This is a pulsing event and not "ripple" but more of a defined square wave form of very small amplitude and lower in frequency(s) than 60 Hz. If this activity gets reflected onto the AC line then it is likely that it will not be filtered completely by power supply filters. What we're talking about is sine waves of a harmonic relationship extending to, mathematically speaking, infinity per Fourier. The frequencies of this harmonic series in the audio band will be present on the voltage reference, the DC voltage reference. This means that the DC line contains some harmonic information, albeit small. But small goes a long way.
An increase of 0.1 volt change from 1.0 v is 1.1 v and is equivalent to a gain of 0.83 dB.
Now the idea of resonance is vibrating at a similar or like frequency.
When this happens there is an energy transfer or increase in beats ala a tuning fork when in resonance with a like frequency.
Like that, the harmonic resonates with a similar or like frequencies in the audio amplifier. There are many harmonics in the square wave form so they too, will resonate with whatever frequency(s) come into the amp.
What you here will be an increase in harmonic information as the signal passes through the amplifier to speaker.
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