NAD M15 HD Owner's Manual page 21

OPERATION
USING THE M15 HD – SETUP MENU
Select the Target Curve you find to be most satisfactory by pressing the
Audyssey key of the remote. The MultEQ XT corrected response can also be
bypassed if you wish.
It is recommended that you take full advantage of the M15 HD's Audyssey
Auto Calibration feature for your speaker setup. However, if you desire to
setup your speakers manually or if you already had run Audyssey Auto
Calibration but would like to make adjustments, the following sections on
Speaker Configuration, Speaker Levels and Speaker Distance can also be
followed and implemented.
NOTE
During manual setting of your speakers, previously calibrated
Audyssey settings could be retrieved by re-adjusting back the altered
configurations as highlighted by an asterisk.
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