grace design m801
mk2
owner’s manual
6
Installation
POWER CONNECTION
The m801mk2 has a built-in universal power supply which accepts line voltages
of 100 to 240VAC. We include power cable specified for the country where it was
ordered, so it should be supplied correctly. If not, please contact your dealer or
distributor for help. For safety, it is recommended that the AC power cable be
connected to a grounded outlet.
TURNING THE POWER ON
The power switch is located on the rearpanel in the IEC power entry module. Switching the rocker
switch to the
I
position turns the mains power on. Switching the rocker switch to the
O
position
turns the mains power off.
FUSES
The m801mk2 uses two T800mA 250V~ 5mm x 20mm Time Delay Fuses.
MOUNTING
The m801mk2 can be rack mounted in a standard 19” equipment rack and does not require any extra
ventilation. 4 Rack screws are included in the box.
AUDIO CONNECTIONS
Microphone input connections are made via female XLR connectors with pin 2 positive, pin 3 nega-
tive and pin 1 ground. 48V phantom power is supplied on pins 2 and 3.
Output connections are made via male XLR connectors with pin 2 positive, pin 3 negative and pin
1 ground. If the output is to be used unbalanced, pin 1 should be connected to signal ground and
pin 2 to signal hot. Due to the nature of the balanced output stage, pin 3 should be left open for
unbalanced operation. See the following
figure 1
.
Note: This will provide a signal of positive absolute
polarity when the preamplifier is being used with a microphone which produces a positive voltage on pin
2 with positive air pressure on the front of the diaphragm. While a vast majority of microphones conform
to this standard a few do not. Use the phase reverse switch to compensate if necessary.
1
2
3
SHIELD
HOT
GND
(OPEN)
XLR MALE
figure 1
- Unbalanced output cable termination
