I use an 845 SET amp yr round without issues. My AC does not run more or harder when the amp is on.
Has the OP moved a reading chair closer to a window so less electric light is needed while reading ?
Has the OP considered how many times a day he opens a refrigerator or freezer door ?
Has the OP considered how much ambient heat is added to a room when cooking food ?
Does the OP use a smart thermostat that can be set run the AC less when people are are away for several hours ?
Lots of other things to worry about....
Has the OP moved a reading chair closer to a window so less electric light is needed while reading ?
Has the OP considered how many times a day he opens a refrigerator or freezer door ?
Has the OP considered how much ambient heat is added to a room when cooking food ?
Does the OP use a smart thermostat that can be set run the AC less when people are are away for several hours ?
Lots of other things to worry about....