A cable question, sort of...

I would just coil it neatly.  For power cables coiling is beneficial (as many turns as possible).

When you "coil" up the wire, you affectively create a parasitic inductor

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.

In addition increase in reactive impedance, even for the wire,  would be negligible (miliohms) at such low frequencies.

@andy2  there is a big difference between cable and a wire.  Coiled wire inductance is increased because magnetic flux created by each turn adds up.  Cable has two wires that create magnetic flux in opposite direction and coiling them would create something that is called "Common Mode Choke" - a choke that has inductance only for common mode signals and no inductance for normal mode (differential) signals.  This principal is also used in creation of wirewound resistors that have no inductance (bifilar windings).

It doesn't matter if you wind it as separate coils or interleave windings - it is still common mode choke.  It will present no inductance for differential signals, since both wires produce canceling magnetic flux.

I give up.

Thank you Al.  If we connect speaker with two separate wires apart the inductance of such connection would be proportional to area in between wires.  Bringing wires very close would make this area (and inductance) close to zero.  Twisting speaker wires (it would be stupid not to) reduces inductance even further reducing magnetic flux, that wires produce, to practically zero.  That's why twisting wires not only reduces electromagnetic radiation but also electromagnetic pickup (also capacitive pickup).  Coiling such two wires, even when not twisted creates bifilar coil - a type of common mode choke.  It doesn't matter if it is an air coil or it is on the ferrite core.  Mutual inductance is as high as it gets since two coils (wire and return) are interleaved.

https://www.wikiwand.com/en/Bifilar_coil

I’m probably guilty of trying to reason with people, who don’t want to learn having their mind set on proving that what they know is right. I would advise such, relatively new on our forum, people, that it pays to listen what Almarg says. When you argue with him on technical subjects (I wouldn’t) better check first if you have his education and experience.

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.

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

heaudio123 They don’t have to be separated, but they often are because it is easier to wire, for isolation, and to reduce capacitance between coils. Common mode air choke has to be wired with a pair of wires (interleaved) because of leakage flux. Such coil is called bifilar coil and is used to wind non-inductive resistors. Look at the first picture on the top of this link: https://en.wikipedia.org/wiki/Bifilar_coil
It doesn’t matter that right side is shorted - you can cut it and connect speaker there. It will still work exactly the same, since opposing currents are identical. Wikipedia description "Bifilar coils impose an inductance in the common mode, but impose no inductance in the differential mode" is basically definition of common mode choke.