Buzz Audio dbc-20diode bridge compressor - Manual (Page 3)

③
1] Installation Precautions
Normally the DBC can be mounted into a rack without any special ventilation
requirements as it runs pretty cool. If there are other units in the rack above
and below the DBC that run hot, it may be necessary to allow for ventilation
gaps between the units to avoid over heating. Excessive heat for long periods
can shorten the life of all electronic devices.
2] The Mains Input
The DBC-20 mains input can be set to run from 110V or 230V. On the rear
panel you will find a circular voltage selector switch to set this up. Generally the
DBC mains voltage is set for the country to which it has been initially sent, but
before powering up the unit, please check the voltage selector.
POWERING UP THE UNIT WITH THE WRONG VOLTAGE SETTING MAY CAUSE
BURN OUT OF THE POWER TRANSFORMER!
It is also important to fit the correct mains fuse. Below the IEC inlet you will see
the fuse draw. Using a small flat blade screwdriver, you can flick open the
draw and change the fuse if required. The fuse draw also has a place to hold
a spare fuse (the square tube). The correct fuses are;
110V = 2 amp slow blow
230V = 1 amp slow blow
These fuses will either be fitted in the fuse draw, and/or supplied in an
accessory bag with the DBC.
3] Audio Connections
On the rear panel of the DBC you will find the XLR input and output connectors.
These connectors are wired as follows;
Pin 1 = Signal Ground
Pin 2 = Signal + (hot)
Pin 3 = Signal – (cold)
Note that the pin1 connection of these connectors is not part of the audio path,
and is provided to shield the interconnecting cable. Leaving pin 1 free at one
end of the cable can help reduce earth loops with other equipment as only the
signal hot and signal cold connections are required.
IMPORTANT; The output of the DBC is balanced using direct drive amplifiers, this
means it should NOT be connected to an unbalanced input whereby one of the
output “legs” will be short circuited to ground. This will cause the output to be
6dB low and operation of the BYPASS function will be adversely affected. The
input of the DBC-20 can accept balanced or unbalanced input signals with no
change in operation.