From what I know, speaker cone will move back and forth to create sound based on the signal it receives.
However, I can't find a definite answer on whether an amplifier output varied DC (or AC with DC offset) or AC?
In case it outputs AC, which means there will be positive and negative voltage, Is the current direction reversed when signal become negative and vice versa? And does that also mean the polarity (+, -) are reversed? If it is, the cone will move both inward and forward from its initial position. This is when it makes me confused because if it produce AC current, why the speaker amp has positive and negative terminal.
In case it outputs DC (AC with DC offset), because voltage is varies so it is still move back and forth, but it will not move inward. But since it is now DC, how can the current direction be reversed? Moreover, many document I looked show that the polarity is changed when speaker is playing so it really confused me, such as this one: https://animagraffs.com/loudspeaker/
What is a definite answer for this question?
Below is an image illustrating what I'm talking about, "x" represent for position of speaker cone, x=0 when the cone is at rest. Sorry for my bad drawing.
However, I can't find a definite answer on whether an amplifier output varied DC (or AC with DC offset) or AC?
In case it outputs AC, which means there will be positive and negative voltage, Is the current direction reversed when signal become negative and vice versa? And does that also mean the polarity (+, -) are reversed? If it is, the cone will move both inward and forward from its initial position. This is when it makes me confused because if it produce AC current, why the speaker amp has positive and negative terminal.
In case it outputs DC (AC with DC offset), because voltage is varies so it is still move back and forth, but it will not move inward. But since it is now DC, how can the current direction be reversed? Moreover, many document I looked show that the polarity is changed when speaker is playing so it really confused me, such as this one: https://animagraffs.com/loudspeaker/
What is a definite answer for this question?
Below is an image illustrating what I'm talking about, "x" represent for position of speaker cone, x=0 when the cone is at rest. Sorry for my bad drawing.