I don't see how does current flow through the load when Q1 is off in the B class amp, please explain?

Update: If Q2 collector is connected to -Vcc, there is again no closed circle or you maybe expect this circle to draw power from the ground instead of the Vcc.
Update 2: I guess circle is closed with -Vcc at Q2 collector, but i found it strange since i see no connection between +Vcc and -Vcc.
6 answers 6