connect 2 different wire gauge to pos and neg speaker terminal

Let’s try a different approach. Teflon is obviously a very good dielectric material, right? It has a dielectric constant of approximately 1.0 if I’m not mistaken. Which means that electomagnetic waves will not (rpt not) be slowed significantly through Teflon. On the other hand, we know that the audio signal - which (I think there is agreement on this) is an electromagnetic wave - is found to travel only around 70-85% of the velocity of light in a vacuum. I believe this means that the electromagnetic wave must be traveling through the copper, not the dielectric. His else could you explain the discrepancy?

almarg
7,435 posts                                                                     08-24-2017 3:12pm


Jim (Jea48), I’m not sure if your most recent post is suggesting that I try to explain why Geoff’s comment is incorrect, or that I refrain from doing so to avoid having this heretofore constructive thread go downhill the way the recent thread on wire directionality has. But I’ll assume the former, perhaps incorrectly.

Al,

For the latter.

I am glad you answered Geoff’s post though.

Jim

As far as the directionality thread is concerned Al and Atmasphere have definitely not proved their points. Furthermore, it should be pointed out much of Al’s argument (as is often the case) is an Appeal to Authority, citing experts to support his argument. Even citing his own expertise, not to mention Atmasphere’s. That’s an appeal to authority. You know, a logical fallacy. Geez, all you would have to do to win any (rpt any) technical argument is say well, I found this guy so and so and he says such and such so I must be right.

Cheers

Dielectric constant of Teflon is about 2. Vacuum has dielectric constant of 1.

Yes, Teflon will slow down electromagnetic wave. Insulator will slow down electromagnetic wave by amount based on its ability to store energy - Permittivity. Dielectric constant is just relative Permittivity. This speed of electromagnetic wave thru typical insulated wire is about 60% of the speed of light in the vacuum. For typical cable it comes to about 5ns/m and it is exactly true for cat5 cable. There is no different electromagnetic wave for audio signals and other signals.

Typical velocity factors, numbers on left are percentages of velocity of light in a vacuum.

Transmission line
95–99 Open-wire "Ladder" Line
83 RG-6 Belden 1189A coaxial cable
82 RG-8X Belden 9258 coaxial cable (foamed polyethylene dielectric)
80 Belden 9085 twin-lead
66 Belden 8723 twin shielded twisted pair stranded (polypropylene insulator)[10]
66 RG-213 CXP213 coaxial cable (solid polyethylene dielectric)