Its not possible on many receivers. Once upon a time when this spec was developed, the thought was for manufactureres to adhere to a "standard" calibration reference ie. 0 and 85db... which evolved into 0 and 75 db... which has become every manufacturer for himself.

As long as the speakers are level matched and you have room on the receiver volume its all good.

Hey I just noticed I turned from a "local" into a "devotee"...I prefer "local".

John