grace design m201
mk2
owner’s manual
4
Front Panel Controls
+48V
RBN
-
20
20
20
30
30
40
40
50
50
60
60
m
201
mk2
+48V
RBN
-
20
+48V
RBN
-
20
20
20
30
30
40
40
50
50
60
60
m
201
mk2
+48V
RBN
-
20
D
E
F
A
C
G
B
A
24 POSITION GOLD CONTACT GAIN SWITCH
Each gain control has 24 positions and adjusts
the voltage gain from 18dB to 64dB in 2dB steps.
B
BI-COLOR LED PEAK INDICATOR
The LED peak indicator, which monitors the
output signal, turns green at -16dBu and switches
to red at +16dBu (12dB before clipping). The
threshold level for peak indication is adjustable
on each channel (see page 8).
C
48V PHANTOM POWER SWITCH
The phantom power switch (l48V)
connects the +48V power supply to pins 2
and 3 on the XLR input connector. This switch
illuminates red. A soft start circuit creates a +48V
ramp up time of 1s to minimize microphone turn
on transients.
D
PHASE REVERSAL SWITCH
The phase reverse switch reverses the absolute
polarity of the music signal at the input of the
preamplifier. The switch illuminates green and
provides power for a sealed gold contact relay
located on the preamplifier circuit board. This
eliminates signal wiring to the front panel and
switch contact performance problems.
E
-20 PAD SWITCH
The 20dB attenuator switch attenuates the input
signal 20dB. The switch illuminates amber when
engaged. Like the phase reverse switch, this
switch controls a sealed gold contact relay on the
preamplifier circuit board. With the -20 switch
engaged, the effective gain range becomes -2dB
to 44dB.
F
RIBBON MIC MODE SWITCH
This switch activates a 10dB increase in overall
preamplifier gain while simultaneously disabling
the 48V phantom power circuit to protect
ribbon microphones. As well, the input coupling
capacitors are bypassed and input impedance is
increased to 20k Ohms.
G
STANDBY SWITCH
Turns power to the m201mk2 audio circuitry on
and off. Will illuminate green when the power is
on.
