The positive speaker wire is a solid color, your negative wire should have a stripe on it.
Positive Wires are usually red.
The positive wire on most batteries is red. If both are black, look for the positive sign by the electrode.
the color of the positive wire should be a bright red color.
The post itself is just a piece of lead that is gray in color. The positive wire is usually red.
There are for stereo wiring color codes. The red wire is the positive wire. The black wire is a ground wire. The green wire is the speaker wire. The white wire is the auxiliary wire.
The positive wire is the 15 terminal and the wire is BK, Black, The 1 terminal is GR, Green
grey
The red wire is the positive wire. The black wire is the ground wire. The white wire is the auxiliary wire.
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Purple
The red wire is the positive wire. The black wire is the ground wire. The green wire is speaker wire. The white wire is the auxiliary wire.