I assume you have not got separate volume controls for speakers A+B.
If you put the speakers in the back of the room at greatly reduced volume it will make the room sound larger. If you put them up front with the others it will screw up the imaging like a blurred picture. Roberjerman is right. If you run tweeter up above 10 kHz this will give you a sense of air and detail but it is artificial and most of us do not do this. The "air" in the recording is the right air.
If you put the speakers in the back of the room at greatly reduced volume it will make the room sound larger. If you put them up front with the others it will screw up the imaging like a blurred picture. Roberjerman is right. If you run tweeter up above 10 kHz this will give you a sense of air and detail but it is artificial and most of us do not do this. The "air" in the recording is the right air.