Speaker cable arrows???

I don’t think you understand how electricity works. No offense. I don’t think the other gentlemen do either. It is the current that moves the speaker diaphragm as explained below.

“The voice coil component of a speaker is actually just an electromagnet. Electromagnets are coils of wire, and they're normally wrapped around some kind of magnetic metal, like iron. By running an electrical current through the wire, you produce a magnetic field surrounding the coil; this field magnetizes the metal in the middle creating north and south polar orientations. The difference between an electromagnet and a permanent magnet is that you can switch the polar orientations on an electromagnet by reversing the current's flow.

Stereos use this property of electromagnets to repeatedly reverse the electrical flow. The amplifier switches the signal over and over, making the red output wire on the stereo switch between positive and negative charges. The voice coil's electromagnet is placed within a permanent magnetic field. The two magnets interact, and every time the electromagnet's polarity changes, the interaction between the magnets changes. When the magnets are repeatedly repelled and attracted, they move the coil back and forth quickly, kind of like the piston in an engine. The moving coil presses and pulls on the speaker cone and vibrates the air in front of the speaker. This creates sound waves via a driver that vibrates the diaphragm.”

glupson4,795 posts

05-05-2020 11:26am

"The Devil’s Teeth. See curves at bottom of page,"

That is what happens when you do not report on weekends.

geoffkait21,656 posts

05-11-2020 7:33pm

The reason for the weird cyclic “dragon’s teeth” curves of the daily deaths and to lesser extent the daily cases curves is that reporting is not consistent over the course of the week, all weeks.

That’s the reason there is an approximately seven-day cycle to the dragon’s teeth.

On Sunday or Monday the curves hit a minimum and hit a maximum later in the week.

OMG Have I created a Frankenstein monster? Have I been cloned? It’s like looking in the mirror. 👀

geoffkait,

When you are ready, I could tell you why teeth were less sharp in the beginning, until a few weeks ago.

I am not hotdogging ya.🌭

Mr. Geoffkait, I don't think it best to quote HowItWorks articles that poorly quote Wikipedia. The result can be less than coherent. Take this sentence,

The voice coil's electromagnet is placed within a permanent magnetic field. The two magnets interact, and every time the electromagnet's polarity changes, the interaction between the magnets changes.

The voice-coil is the electromagnetic, and the voice-coil's magnetic field interacts with the permanent magnet field. Perhaps that is what they meant, but you get the impression they didn't really understand it.

The signal energy travels down the cables in one direction >>>> from the source to the load, (amp to speakers), in the form of an electromagnetic wave.

That is not really true and is shown not to be true with a simple case, a DC voltage and a load. There is no continuous electromagnetic wave to transfer energy. What there is is an electromagnetic field that cause electron movement with causes a magnetic field. The product of those two (power) always points to the load which is the direction of power transfer.

In a transmission line, the changing e-field causes electrons to move which propagates down the cable as an electromagnetic wave, but technically, other than losses, no work is done. The "wave" sets up the fields, but does not define the transfer of energy  ... at least using classical EM theory.