7
m
904
b
remote control unIt
1
2
talkback
GRACE DESIGN USA
main level / edit
headphone level
cal
sel
dim
mono
mute
mon cue
spkr sel
m
904
high fidelity monitor system
input
analog
BAL
1
BAL
2
UNBAL
CUE
input
digital
AES3
1
AES3
2
S/PDIF TOSLINK/
ADAT
B
A
C
D
E
G
F
I
O
K
M
N
J
L
H
P
Q
A
INPUT ANALOG SWITCHES This row of four green LED illuminated switches is for selecting between and
monitoring any of the analog sources connected to the m904.
B
INPUT DIGITAL SWITCHES This row of four green LED illuminated switches is for selecting between and
monitoring any of the digital sources connected to the m904.
C
HEADPHONE LEVEL DISPLAY This blue, 3 digit headphone level display shows the current relative head-
phone output level value based on the position of the headphone level rotary encoder. The range of this display
is 0 to 100dB.
D
HEADPHONE LEVEL ROTARY ENCODER This stepped rotary encoder controls the headphone output level in
.5dB increments. Double clicking the encoder alternately mutes and recalls the stored level preset.
E
MAIN LEVEL/EDIT DISPLAY This blue, 3 digit main level/edit display shows the current relative main speaker
output level values based on the position of the main level rotary encoder. The range of this display is 0 to
100dB. The display also shows edit values when the system is in CAL mode.
F
MAIN LEVEL/EDIT ROTARY ENCODER This stepped rotary encoder controls the main speaker output levels
in .5dB increments. This encoder is also used to adjust level offset calibration values when in CAL mode. Double
clicking the encoder recalls the stored level preset.
G
TALKBACK SWITCH This red illuminated momentary action switch engages the talkback microphone circuit
for as long as the switch is depressed. Releasing the switch disengages talkback. This switch can be configured
in Cal Mode for latch operation (press and release toggles talkback state).
