How can you reduce the energy lost in the cables?????

Question

How can you reduce the energy lost in the cables?????

Answer 1

You are talking about attentuation, when a signal degrades over a long distance.

There are many ways to reduce attentuation:

1) Higher gauge copper wire.

2) Shielded cable to block EMI and RFI.

3) Powered units, such as amplifiers.

4) Reduce cable lengths.  The longer the cable, the more likely for signal degradation.

Answer 2

Well firstly, what energy and what cables?

You question lacks details so is kind of hard to answer.

However, generally the larger the cross sectional area of a cable the lower the impedance to current flowing through it.

However larger cables might not be practical and tend to cost more per unit length than smaller cables.

Alternatively high voltage can be passed through a much smaller cable but of course that isn't really an option if the cables are around people....and your question lacks such detail.

Answer 3

Cool the whole thing close to absolute zero.

That said, I assume you have some particular type of cable and application you mean .... provide more details.

The answer varies with the type of cables. For example, for speaker cables use larger guage wire; for digital Coax, less impedence variation around 75 ohms and better shielding; and, for HDMI, larger guage conductors and attention to impedence. All cable types exhibit some type of degradation with distance, so there are distance limitations.

My somewhat facetious opening comment is intended to suggest superconductivity ... where there is essentially no loss of signal with distance ... it's just not practical (or applicable) in much of the audio world.