Pass Labs X1 Manual De Usuario

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X1 Owner’s Manual
The preamplifier main chassis / control unit has four sets of  input 
connections, both single-ended and balanced output connections, a 
tape loop and a full function remote control that mirrors the front 
panel functions.
The main chassis also has a DB-25 connector that connects to the 
remote power supply and a single pair of  5-way binding posts that 
are used for remote amplifier turn-on. The preamplifier’s voltage 
and current rating are indicated on the bottom of  the power supply.  
It will be either 240 volts,  220 volt,  120 volts, or 100 volts.  A 0.5 
amp 3AG slow blow fuse is provided with 100-120 volt units, and a 
0.25 amp slow blow fuse is provided with 220-240 volt units.  The 
frequency rating of  the power supply in all cases is 50 to 60 Hz.  The 
preamplifier typically draws 30 watts during operation. Please verify 
that the pre-amplifier’s indicated voltage requirements are consistent 
with the voltage available at your location, prior to operation.
The main preamplifier chassis is connected to the power supply 
with a custom shielded cable that carries both the analog and digital 
power. Please note this power cable must be installed before 
the preamp is powered up. 
The power cable plugs, into and then 
screws into, the rear panel of  the main chassis and the power supply.  
The connectors are a tight fit but should never need to be forced. 
The X1 will function with either DB-25 on the power-supply chassis.  
The additional DB-25 is for future performance enhancements.
We have provided a standard AC power cord that fits into the 
IEC line receptacle at the right rear of  the power supply chassis.  The 
preamplifier is equipped for operation with an earth ground which 
is provided by the  user’s AC outlet.  Never defeat this ground, its 
use will not adversely affect the performance of  this product.  The 
chassis and circuit ground of  the preamplifier are connected to earth 
through a power thermistor, which gives a ground connection for 
safety but helps avoid  troublesome ground loops.
The X1 has a total of  four inputs and a separate tape loop.  Two 
of  the four inputs (Input numbers 1 & 2) can be used single-ended 
or balanced.  The other two inputs (inputs 3 & 4) are single-ended 
only.  The tape loop has both single-ended and balanced inputs 
and outputs.  Balanced inputs and outputs are via XLR connectors.  
Single-ended inputs and outputs are via RCA connectors.  On the 
XLR connectors, pin 1 is grounded, pin 2 is the positive signal, and 
pin 3 is the negative signal. Left channel RCA connectors are marked 
with white spacers.  Right channel RCA connectors are marked with 
a red spacers.  Balanced XLR inputs and outputs are marked with 
“L” for left and “R” for right channel. 
Setup