A speaker is an INDUCTIVE load. What that means is that it proportionally resists the rise of voltage across it. In Calculus, the voltage across an inductor is given as:
V = L x di / dt
L: inductance in henries and di / dt is the rate of change of current thru it.
When transients occur, the amp has to overcome the resistance of the speaker to increasing the voltage across it. That is why it is difficult to drive inductive loads. To be able to do that, amp has to be able to deliver loads of current.
Electronics 101: inductive loads.
PS: Music is not a straight sinusoid signal. It is a MESS of transient signals. A piano for example is almost like a steep 90 degree rise in signal. To faithfully reproduce it, an amp must be able to supply LOTS of transient current, hence the need for an ENORMOUS power supply.
Having said that electrostatic speakers a different ball game. They are capacitive loads. Combine different frequencies and it is a miracle that modern amps actually work :-)
V = L x di / dt
L: inductance in henries and di / dt is the rate of change of current thru it.
When transients occur, the amp has to overcome the resistance of the speaker to increasing the voltage across it. That is why it is difficult to drive inductive loads. To be able to do that, amp has to be able to deliver loads of current.
Electronics 101: inductive loads.
PS: Music is not a straight sinusoid signal. It is a MESS of transient signals. A piano for example is almost like a steep 90 degree rise in signal. To faithfully reproduce it, an amp must be able to supply LOTS of transient current, hence the need for an ENORMOUS power supply.
Having said that electrostatic speakers a different ball game. They are capacitive loads. Combine different frequencies and it is a miracle that modern amps actually work :-)