12
X
s
Preamp Owner’s Manual
Lets talk about AC power requirements. The X
s
Preamp draws 80
watts of current continuously.
The voltage and current rating are indicated on the rear panel of the
power supply chassis. The power supply will be rated for either 100
Vac, 120 Vac or 240 Vac. Voltages are fixed at the time of build and
are not changeable in the field.
The frequency rating of the AC line source will be 50Hz to 60Hz
nominal in all cases. Please verify that the power supply voltage
and current rating are consistent with the local mains power before
connecting this product to the electrical mains.
The Pass Laboratories X
s
Preamp power supply is provided with a
conventional IEC power cord rated at 15 amps. The safety ground
is provided by this power cord and attached at the chassis in the
conventional approved manner.
The AC power input to the power supply runs through an RF filter,
which reduces high frequency noise coming into and going out of
the amplifier power supply. This filter and the safety ground both
depend upon a quality earth ground from the ground pin on the
power cord.
Under no circumstance should you defeat the ground connection
of the power cord. Safety ground is isolated from signal ground to
reduce the incidence of ground loop noise. The presence of safety
ground will not degrade the audio signal chain.
You may substitute an aftermarket detachable IEC 320 style power
cord of your choosing provided it is rated for at least 15 amps
and meets all legal requirements and has been approved by the
appropriate local testing authority.
Power requirements
