5
XP-22_om_prelim
Operation:
In use the XP-22’s front panel controls and alphanumeric display
are quite straight forward, and intuitive. We encourage you to
become familiar with their operation prior to establishing any input
connections with this unit.
After all the inputs and outputs are connected and double
checked, you can now turn on the preamp by means of the power
switch located next to the AC inlet, on the rear of the power supply.
The left most button on the front panel is Mute. Pressing this button
toggles between mute on and mute off. Mute on removes signal
from the output of the preamp.
The front panel mode switch cycles the preamplifier display through
2 different levels and off. These two functions are as follows:
Bright, Dim and Off. Using any functions with the display “off” will
momentarily bring the display back up to its dim setting.
The two Select switches (designated by left and right pointing
arrows) then alter the displayed active input, 1 through 5.
Input 5 is unique in that it is linked with the Home Theater (Unity
Gain) function. (The HOME THEATRE FUNCTION is discussed at
length later in this manual.) The two select arrows logically control
selections of the various inputs to the preamplifier.
Before selecting the theatre pass through (pass thru) option, it is
imperative that the input device on input number 5 has its gain set
to minimum. Failure to follow this precaution could result
in a volume level intolerable to both ears and speakers. (The
standard 2 volt source component, with the pre-amp set to 0 dB,
will drive most power amps to full rated output.)
As an added precaution when “pass through” is selected the
volume ramps upto 89. This is to prevent nasty surprises when
a similar fashion balanced XLR inputs and outputs are marked with
“L” for left and “R” for right channel.
The main outputs are located at the left-hand side (viewed from
the rear) of the rear panel, two male XLR connectors, and two
RCA connectors, “R” (right) and “L” (left). The RCA connector’s
ground is in parallel with pin 1 of the XLR outputs and the RCA hot
is fed from an independent summing junction that maximizes the X
circuit benefits. The RCA, single-ended, outputs are buffered from
the balanced outputs. You may use both the single ended and
balanced outputs at the same time. On the XLR, pin 1 is ground,
pin 2 is positive, and pin 3 is negative.