Armchair Control of Your m903
This high quality wireless remote control offers very convenient control of the Grace Design m903 headphone amp/DAC. Several of the buttons on the remote have dual functions, accessed by either a 'push' or a 'push and hold' action, and are described below.
Pushing and releasing this button toggles the mute setting for the currently se- lected output on the m903. Once engaged, active mute status will be reflected by the 7-segment display flashing on and off in regular intervals.
To disable muting simply press the mute button again. The output will return to the current level setting and the display will return to solid. In addition to pushing the mute button, mute can be turned off by making any volume change (on remote control or on the m903 itself). Pushing and holding the mute button will toggle the exclusive output (EO) setting and will exit you from the submenu mode. The current exclusive output status will be displayed momentarily on the m903 display.
Pushing this button toggles the x-feed status on the m903. The current x-feed status will be displayed momentarily on the m903 7-segment display, as well as by the dedicated x-feed LED to the right of the volume control. Also, pressing the x-feed button while in the setup menu will return the m903 to normal operation.
Phones / Line
Pushing and releasing this button during normal operation toggles between the three available outputs (phones, line 1 and line 2). The newly selected output indicator LED will illuminate and its corresponding level will be displayed on the 7-segment display.
Pushing and holding this button enters the m903 setup menu. From here you can control the setup menu in the same way as from the front panel volume encoder, only with the volume up / volume down buttons used to scroll, and a single push of the PHONES/LINE button serving as the 'enter' switch. Pushing and holding the PHONES/LINE button again will store all changes made and exit the setup menu.
Pushing this button will directly enter balance mode option. From here, pushing the volume up button will adjust the left (vol down) and right (vol up) balance. Conversely, pushing the volume down button will adjust the right (vol down) and left (vol up) balance. These changes are indicated by the right or left facing speaker symbol changing to the corresponding balance offset value. Pressing this button while the m903 is in balance mode will exit the user from the sub-menu and balance mode.
Pushing and holding the balance button during normal operation will toggle the MONO mode feature of the m903. This setting simply sums the left and right channels of all outputs together. When MONO mode is active, the 7-segment display no longer displays the current output level numbers and shows two large facing brackets. Pushing and holding again returns the m903 to normal stereo operation, as indicated by the brackets changing back to the current output level numbers.
Volume Up / Volume Down
In normal operation pressing the volume up or down buttons will change the selected m903 output level respectively in 0.5dB steps. Also, pressing the volume up or down buttons while the selected output is muted will un-mute the output.
Pushing and holding the Volume up / down buttons results in continuous volume changes. The longer a button is held the quicker the volume level changes.
If the setup menu has been entered by pushing and holding the PHONES/LINE button, the volume up and down buttons are used to scroll through the available setup menu items.