Suppose we have a circuit that has a LOW OUTPUT IMPEDANCE.
This means it will deliver a high current to a load.
The output voltage may be 1v or 200v – we are only describing the current capability of the circuit.
The term LOW OUTPUT IMPEDANCE is relative and it may be VERY LOW when compared to one amplifier or medium output impedance when compared to another amplifier.
It also means the amplifier (or circuit) should be connected to a low impedance (resistance) device to allow the maximum transfer of current (energy).