When you put your MR s in a corner or up against walls, their bass characteristics change. The apparent loudness of the low frequencies increases when the monitors are placed close to a wall, and even more so when they are placed in a corner.If you have placed the monitors against the walls and would like to lower the bass, try setting the acoustic space switch to the –2 dB [Half Space] position. If the monitors are in the corners, try the –4 dB [Quarter Space] position.