grace design m906
owner’s manual
18
grace design m906
owner’s manual
19
level values in dB. The range is 0 to 100 with 0 being full-off and 100 equaling unity gain, or full-on
level. In CAL mode (discussed later), the LED display labeled main level/edit is used to display edit
parameters as they’re being changed.
Using the Headphone Outputs
The m906 provides two reference headphone outputs, via ” TRS jacks wired as left channel to Tip,
right channel to Ring and ground to Sleeve. One is located on the front panel of the system mainframe
and the other is on the rear of the remote control unit. Both may be used simultaneously. The m906
headphone amplier is based on our model 901 reference headphone amp except that the m906
version will allow you to listen to digital audio sources up to 192kHz!
Using the Headphone Outputs to Monitor 5.1 Channels
When you have a 5.1 source selected for monitoring, the headphone outputs will normally only allow
you to hear the left and right channels from this 5.1 source. There may be times, however, when you
may want to listen (through headphones) to other channel combinations of the 5.1 source. We’ve
included a nice little feature that allows you to do this. Here’s how this special mode works:
First, select a 5.1 source input; analog or digital. Please note that this special 5.1 headphone mode cannot be
made active if your current source selection is stereo.
Press down on the headphone level rotary encoder switch. You’ll feel a click when you do this, and yes, there’s
a switch under there. Hold it down for about 4 seconds. This action will turn the 5.1 headphone feature on.
Notice that the Left and Right channel solo/mute switch LEDs are now illuminated. This indicates which pair
of channels is currently being fed to the headphone outputs. You’ll also notice that the solo/mute master
mode switch LED is extinguished. This is because this switch is not used in this mode.
The channel switches in this mode, unlike normal solo/mute mode, act in an interlocking fashion. This means
that once you select a new pair of 5.1 channels to monitor through your headphones, the previous channel
selections are automatically turned off.
Channel pairs that are available for monitoring in this mode include left/right, left surround/right surround
and center/sub. Please note that you cannot monitor individual channels or other pair combinations other
than which are listed above. (continued)
To select the Left Surround/Right Surround pair, press either the LS or RS switch. The surround channels
will now be sent to the headphone outputs, the corresponding channel switch LEDs will light solid and the
previous channel pair selection will become inactive.
To select the Center/Sub channel pair, press either the Center or Sub switch. These channels will now be sent
to the headphone outputs, the corresponding channel switch LEDs will light solid and the previous channel
pair selection will become inactive.
To return to the Left/Right channel pair, press either the Left or Right switch. These channels will now be sent
to the headphone outputs, the corresponding channel switch LEDs will light solid and the previous channel
pair selection will become inactive.
To exit the 5.1 headphone mode and return to the m906’s normal operating state, press the headphone
encoder switch.
Note: If you’ve selected a 5.1 source, are currently in the 5.1 headphone mode and inadvertently select a
stereo input source, this mode will automatically become inactive and the m906 will return to it’s normal
operational state. You can, however, select different 5.1 sources while in this mode. CAL mode is not operable
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