Dear Alex my time is very well paid in American dollars, and I'm dedicating it to you for free.
We are not going yet to the nonsense that makes sense for you.We may, but not now.
So far we have probable configuration of :
6 speakers in 3 pairs where 3 power cords were connected to the same electrical outlet 220V 15A fuse protected
Each pair had its own amplifier .
If we draw the circle we would spread them equally on it but each pair of speakers is facing each other in the straight line
drown through the center of the circle.
Computer with the sound card was connected to separate outlet presumably from the same electrical phase.
_________________________________________________
Impedance match and load specification:In electronics, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for a desired value.
https://en.wikipedia.org/wiki/Impedance_matchingload by itself is specified in its general form as:
the quantity that can be carried at one time and also measured quantity of a commodity fixed for each type of carrier.
So in the electrical outlet we have 220V potential and ZERO current.
The load will be measured by current drown from the outlet and expressed by European formula P=U x I
where P is power in W
U is 220V
and I (current in Amps) is unknown yet.
So Load needs enough power drown from the electrical outlet .
That has nothing to do with gain or amplification or number of speakers or feedback
Load is a Load. But if we don't have
purely resistive Load we may expect that Load doesn't have fix value.
We know that the bigger the load the higher is the current drown from the electrical outlet 220V
So we may project that outlet as a big Russian guy having enough of power to carry on the load needs-
-like if it was not some resistive load but a pretty Ukrainian teenager girl.
She wants this she wants that, and the guy happy or not must deliver.
Impedance vs changing value of the Load:
That pretty Ukrainian girl requires a maintenance resisting in many ways if not happy.
In electronics the Load can be purely resistive at 10% but in many ways if not happy
manifesting additional capacitive or inductive reactivity at 90%
Your own picture here:
Re: Acoustical feedback energy system shows the transformer
from power supply mounted in one of the every two speakers.
This transformer has coils- means
inductive reactance and
capacitive reactance of the winding:
https://en.wikipedia.org/wiki/Gyrator%E2%80%93capacitor_modeland you have 3 of these transformers in your 3 pairs ( total 6 speakers .)
At resonance, both
capacitive and inductive reactance will be
equal to each other.
The
inductor and capacitor will also be conducting more current at the resonant frequency.
Current flowing across both components is 180° out of phase, which results in a mutually
canceling current.exploring-the-resonant-frequency-of-an-rlc-circuit
So we have something that looks like short circuit blowing the fuse .
In other words you didn't have any gain, any magic energy produced, you just sort of shorted the two terminals of that 220V outlet.
And by that you are the double loser. You can't use your speakers at this particular frequency and you don't have power in the outlet.
what-is-a-srf-this-is-used-in-ac-power-distribution-system-with-isolation-The SRF is the frequency where the capacitive and inductive elements in the system are of equal magnitude and opposite sign.
This leads either to very low impedances
The effect is that the system does not work as intended. Keeping SRF well away from the operating frequency is a key design requirement.
To better understand what I;m talking about take look at the DC and AC Relay. or DC and AC electric door lock - the strike
A
DC relay coil has resistance that limits the dc current.
An
AC relay coil relies on its impedance for governing the current.
So it has few winds ~10% and ~90% is impedance
If you than decide to connect the AC relay to DC voltage you will damage it as we speak.
Sometime it will blow in fumes.
because for DC that relay or that electric lock doesn't have any impedance - it Doesn't exist.Additional factor to know:
SWR of impedance match.
standing wave ratio (
SWR) is a measure of
impedance matching of
loads to the
characteristic impedance of a
transmission line or
waveguide
https://en.wikipedia.org/wiki/Standing_wave_ratioIf we don't want to explain the phenomena with use of Counter-electromotive force (counter EMF, CEMF, back EMF), - the electromotive force (EMF) manifesting
as a voltage that opposes the change in current which induced it. CEMF is the EMF caused by electromagnetic induction.
we may use -
The short explanation:
If There is no impedance patch to the load than part of that energy is reflected back and impacts the source of energy like Transmitter of RF or the outlet.
_____________________________________________________________
So you were not producing any magic energy but in resonance your power transformer primary winding had more current than your outlet fuse was able to withhold.
cheap Chinese design - that's all.
Note:
The
electronic load in tests : tests energy sources or energy conversion blocks with static or dynamic loading.
Wesley