It is the maximum current the amp will draw. Most probably never unless I drive it to about about 50 Watts of output, I am only looking at about 20W mostly. Just designing for the worst case.What determines the current? When you say you are looking for 7A, is that under all conditions? Or is that just the max current at the minimum value of the load impedance?
What is the maximum voltage you can live with at the output of the circuit?