The TDA7498E has a minimum voltage requirement of 14 vdc, yes, but there is no way it will produce the rated output power unless you power it with the maximum VCC = 36 vdc. Power output is totally dependent on supply voltage.
Is TDA7498E okay to work with DC 12V power supply?
If I want to use TDA7498E on a car, and the car is DC 12V power supply, can it work?