Home Theater System User Manual

5
XP-20 Owner’s Manual
As with all audio electronics the power cable should be the last thing
attached and the first one removed any time you hook up or remove
equipment from the signal chain. The DIN-25 umbilical cable
should never be connected or removed with the power supply chassis
plugged into house power.
The preamplifier has five sets of stereo input connections, both
single-ended and balanced output connections and a full function
remote control in addition to the normal complement of front panel
control functions.
The preamplifier’s voltage and current rating are indicated by affixed
tag on the rear of the preamplifier’s separate power supply. It will
indicate 240 volts, 220 volts, 120 volts, or 100 volts. A 1.0 amp
3AG slow blow fuse is provided with 100-120 volt units, and a
0.50 amp slow blow fuse is provided with 220-240 volt units. The
input frequency rating of the power supply is 50 to 60 Hz. The
preamplifier typically draws approximately 25 watts of power from
the utility mains during operation. Please verify that the indicated
voltage requirement of this preamplifier’s power supply is consistent
with the utility voltage at your location.
We have provided a standard IEC AC power cord that fits into the
IEC 320 line receptacle at the rear of the power supply chassis. The
preamplifier and power supply is equipped for operation with an
earth ground provided by the users AC outlet. Do not defeat this
safety ground. The chassis and circuit ground of the preamplifier is
connected to earth through a power thermistor, which gives a ground
connection for safety but helps avoid ground loop related noise
issues. Please connect the power supply to the preamplifier chassis
by the supplied umbilical before plugging the power supply into
the wall. Conversely please unplug the power supply from the wall
before disconnecting the umbilical cable.
There are a total of five inputs. Two of the five inputs are balanced
XLR only. The other three inputs are single-ended only. The XP-20
also has a “Tape Loop” with single ended inputs and outputs. There
are three pairs of outputs available with identical gain structure. One
pair Balanced, two pairs single-ended. You may use more than one
output at a time.
The single ended outputs are paralleled, but under most
circumstances will drive several devices at once, with no anticipated
ill effects by virtue of the XP-20’s low output impedance and high
current capability. The balanced outputs are derived from their own
In’s and Out’s