How do you tell positive and negative speaker terminals?
Beside this, how do I know which battery terminal is positive?
One is marked positive (+), the other negative (-). There are also positive and negative cables in the jumper cable set. The red one is positive (+), the black one is negative (-). Never connect the red cable to the negative battery terminal or a vehicle with a dead battery.
Herein, why do speakers have positive and negative?
A pulse of energy comes to the speaker, and pushes the speaker cone "out" to make a sound. If you hook the negative wire to the positive terminal, and the positive wire to the negative terminal, the same pulse of energy pulls that speaker cone back "in".
typically, the positive wire is red and the ground, or negative, is black. However, most speaker wires don't do colors. Good news is, with speakers it doesn't really matter which one you choose as your positive and which as your negative, just so long as you are consistent.