A cable question, sort of...

When you "coil" up the wire, you affectively create a parasitic inductor.  If the cable is long enough that may end up to have too much inductance from the coiling affect, the parasitic inductance may create some resonance which in turn could make the bass of the subwoofer sound a bit mushy.  The question is if your cable is long enough that it will create enough inductance that it will make a difference in listening.  

No, you don’t. You’re not coiling the wire. You are coiling the cable (big difference). Look at the link at my previous post.

It’s just the same. I said "wire" but I could have said "cable". When you coil up either a wire or cable (pick your language preference), you affectively create an inductor - pretty much basic electrical engineering 101 you learn first in school.  The link you posted doesn't say much if anything.

But like I said, if the cable is long enough, you probably see a difference. If the cable is short, then probably not much.

Cable has two wires that create magnetic flux in opposite direction and coiling them would create something that is called "Common Mode Choke"

i think there’s a difference with common choke. In a common choke, the positive and negative have mutual inductance couple between them. When you coil up a cable, there is no mutual coupling like in that of a common choke.

As for the twisted pair, you do increase the mutual coupling, but just coiling up the cable, you just increase the inductance.  

As I said, common choke works because of mutual inductance coupling between the positive and negative. Coiling up the cable will not increase the mutual inductance since they wire still running in parallel in respect to each other. Not only that, by coiling up, you increase the mutual capacitance of the positive and negative which will degrade the signal dynamic.

If what you said is true then every speaker cables should be all coiling up.

Here's a pic of a common mode choke.  You have to coil it up in such a way to increase the common inductance coupling.  So in order to make a common mode choke, you first have to separate the positive and negative like the picture.  Just coiling up them all together won't make a common mode choke.

https://www.coilws.com/images/common-mode/common-mode-choke_schematics.jpg

Kijanki is correct that coiling a cable in which the + and - conductors are twisted together or at least bundled together closely will not increase inductance to any significant degree.

That’s not what he said that which I was arguing about. The point he made about "common choke" which was the point of contention.

But **even if** it did so it still wouldn’t matter because the impedance presented by an inductance is directly proportional to frequency, and under any reasonable circumstances that impedance will be insignificant at the deep bass frequencies that are reproduced by the sub

Well ... to which degree it will have an affect on the sound is up to the listener. With a good system, the difference could be significant.

 any slight increase in capacitance that may result from coiling won’t matter either at deep bass frequencies ...

Again, it may be insignificant in your system, but it may be very significant in some other system.

When you argue with him on technical subjects (I wouldn’t) better check first if you have his education and experience.

OK, what level of education does he have that nobody should argue with him?

AFAIK Masters in EE in prestigious Columbia University. What about you?

EE as well.  Just because he has a Master in EE, does not mean he's right all the time.

No it doesn’t but I have the same degree from less known university plus 40 years experience as a design engineer in electronics (many different fields) and I can judge about somebody’s competence. The fact that you don’t or cannot understand the principle of common mode choke and argue just to argue make me exit. You don’t make friends here.

I understand perfectly what a common mode choke is. What you said was over-simplified and that’s the problem.

Whenever I've heard people showing off their degree and experience, there tends to be something else going on.  I on the other hand would never do that unless somebody asked me explicitly. 

I've found a similar thread on another forum with this quote which I found sort of funny.  Some people would go in great length trying to prove coiling does not make any difference.  Notice the words " no appreciable effect", as if there's no effect.

https://www.avforums.com/threads/problems-coiling-speaker-cables.246909/

 I read of an experiment that was carried out where a length of speaker cable was coiled tightly around a 2" diameter steel bar with no appreciable effect on the its performance.

Answer this:

A brand new pair of shoes need some breaking-in and that most people would agree. But for some reason, a cable needs breaking-in seems somewhat mysterious. Shoes and cables are made of the exact same materials: electrons, neutrons, protons ...

Also, think about this. The force your feet exert on the shoes is the same force the move electrons. It’s called electric field. When you press on the shoes, it’s your electric field that pushes on the shoes. The whole time you’re wearing your shoes, none of skin of your feet literally never comes into contact with the shoes atoms.

The same electric field that pushes the electrons in the cables that creates a current.

So you have to resort of AI cheap shot lols.