Most people use the gold or reddish copper wire as the positive as it is the red terminal and the silver or non colored lead to the negative as it is black.
Gold and silver wires speakers.
In the case of teflon wire you have always seen silver as either the sole metal present or at least as the plating.
Alternatively if you have a black wire it ll be negative if the other wire is red or positive if the other wire is striped.
The silver is necessary to counteract the corrosive process for coating teflon to the wire.
Silver is also the best conductor of electricity as shown by the following chart of bulk resistance measured in micro ohms centimeter.
Though silver wire is more conductive than copper wire of the same length copper wire is the global standard.
Because silver only provides a relatively minor increase in conductivity despite being much more expensive silver is reserved for sensitive systems and specialty electronics.
Purity should be at least 999 three nines but keep in mind that much of the gold and silver you may purchase has been refined from existing stock and is not necessarily virgin or newly mined.
Fine silver round wire can be purchased from jewelers silver crafters and other sources including our sister site tempo electric.
All you need to do is connect one color to the red on both and the other to black on both or whatever other color it is mine are red and black.
This is only visible if the insulation is clear or see through so that color can be distinguished.
To find the right wires on a speaker check to see which colors you have.
For example negative silver wires are paired with positive gold wires.
In dealing with speaker wires the positive speaker wire will be silver in color.
The negative wire will usually be copper in color for this same instance.
You could spend 10 000 on silver braided speaker cables but you re going to get a much more significant change in sound spending 1 000 on a new amp or 500 on a new dac.