Schumann Resonator

I find my speakers interfere with my Schumann Resonators .

It’s a Yiddish word (  קיביץ ) actually that translates roughly to “speak informally”.

I enjoyed reading through most of this thread, especially the explanations posited concerning the earth's frequency and dither. Very entertaining.

@bhvf  I understand your frustration and lack of any response offering a rational explanation.
@ps Ditto.
I can tell you that I have been working in the area of resonance and resonators for a long time and it took a longer time to discover a rational explanation as to why the Schumann resonance devices work to affect audio systems and signals.
The idea is not rocket science, in fact it's pretty elementary physics and electrical theory.
The frequency must be a low em frequency. It can be as low as 8 Hz or even lower. Google ELF or ULF in the frequency spectrum. 

The frequency generated is a square wave. Not a sine wave.

Joseph Fourier, the eminent 18th century physicist made the discovery that square waves are comprised of a series of harmonically related sine waves of various phases (cosines too) from the fundamental out to infinity. The good news is that as you sum the harmonics up the frequency band the amplitude of each subsequent frequency decreases in a logarithmic way.
Every Schumann device that I am aware of, generates a square wave at 7 - 8 Hz or so.
But the question is how does that affect audio signals?
The answer lies in resonance.
Just like a tuning fork, when the frequency of the fork comes into contact with another thing that has the same resonant frequency then that thing is going to vibrate or gain energy from the activating or stimulus energy signal. So, the low frequency square wave with its underlying sine wave harmonic structure interacts with complex audio signals comprised of  sines and various wave forms that can possibly be described under the sun, mathematically (i.e. calculus).
This interaction activates resonances throughout the audio spectrum depending on the activating or driving signal (Schumann) and the audio signal. There is more energy from the resonance happening at the lower frequencies than at the higher frequencies due to the higher amplitude of the early harmonics. Less energy at higher frequencies also assures a more musical affect.
The energy change can be easily measured with a sound level dB meter aimed at the speakers and can be seen on a scope or spectrum analyzer.

To sum up, a low frequency square wave unleashes a harmonic series that when introduced into an audio system, interacts with like frequency signals,produces resonances or an increase in energy or amplitude of those audio signals. 
Greater S/N occurs along with increased dynamic range to the sound.

Btw, there is a brand that promotes the idea and that is ADD-Powr.

bemused is exactly right. Like I said before, this is nothing new. I've been using ElectroClears in my system for at least 10 years. They labeled their products as using QRT technology.  Nordost eventually bought the rights to QRT and have a number of products based on it. I think ADD-Powr is just another derivative of that technology. All of these things manipulate electromagnetic fields and the resonances they create.  I really don't get people who don't understand this or think its "voodoo" After all, since we use Alternating Current (AC) the sole purpose of a transformer, for instance, is to change the magnetic field. The Schumann Resonance is just a naturally occurring change to the electromagnetic field. 

@bemused, There is a sucker born every moment. All of you tweaky guys would do better spending your money on lottery tickets. You might actually get something out of it. 

@ mahgister, I think you need a job.