Pass Labs X250.5 用户手册
5
X250.5 Owners Manual
the back of the amplifier, and then into the wall. Then turn the breaker
switch on (up). The lights in your house will blink when the power sup-
ply charges the capacitors; this is normal. This magnetic breaker switch
is not to be used as a safety disconnect during servicing and is not a
substitute for unplugging the power cord.
switch on (up). The lights in your house will blink when the power sup-
ply charges the capacitors; this is normal. This magnetic breaker switch
is not to be used as a safety disconnect during servicing and is not a
substitute for unplugging the power cord.
On the front panel, the “Standby” LED indicator should be glowing
blue, indicating that the power is on. The “Power” LED should not be
on. If the “Power” LED is on, don’t get excited, just use the front panel
stand-by button to go into stand-by mode, with the “Standby” LED on
and the “Power “ LED off.
blue, indicating that the power is on. The “Power” LED should not be
on. If the “Power” LED is on, don’t get excited, just use the front panel
stand-by button to go into stand-by mode, with the “Standby” LED on
and the “Power “ LED off.
OK, so the amplifier is sitting there in stand-by mode with just the single
blue LED lit. No speaker connected, as yet. You can go ahead and con-
nect the source and speakers. Some speaker cables are very difficult to
work with due to physical size and construction, make sure the speaker
connections do not short together. It is recommended that you connect
the speaker ends of these cables first.
blue LED lit. No speaker connected, as yet. You can go ahead and con-
nect the source and speakers. Some speaker cables are very difficult to
work with due to physical size and construction, make sure the speaker
connections do not short together. It is recommended that you connect
the speaker ends of these cables first.
Some powered subwoofers require an audio signal ground reference and
their makers may suggest that a black speaker terminal is where this volt-
age reference might be found. On complementary designs, which would
be typical of all power amps produced by Pass Laboratories™, this is
an incorrect and unsafe assumption. On all Pass Laboratories™ power
amplifiers a reference of 0 volts will be found only at pin 1 of the XLR
input or at the shell of the RCA input.
Reference connections for these devices require special consideration
when used with our product. If you have such a device, and wish to
use it with our product, please contact our Foresthill, California fac-
tory for specific instructions.... you have been warned.
their makers may suggest that a black speaker terminal is where this volt-
age reference might be found. On complementary designs, which would
be typical of all power amps produced by Pass Laboratories™, this is
an incorrect and unsafe assumption. On all Pass Laboratories™ power
amplifiers a reference of 0 volts will be found only at pin 1 of the XLR
input or at the shell of the RCA input.
Reference connections for these devices require special consideration
when used with our product. If you have such a device, and wish to
use it with our product, please contact our Foresthill, California fac-
tory for specific instructions.... you have been warned.
The amplifier can be driven single-end or balanced, if driving the am-
plifier single-ended, leave the supplied jumper in place (between pins
1 & 3 on the XLR). Your amplifier will operate without the jumper
in place, but performance will be significantly diminished. You must
choose either XLR or RCA inputs it is not advised to try and run both
concurrently.
Now that the source component is connected, make sure there is no
signal coming from it, probably by turning the volume all the way
down.
plifier single-ended, leave the supplied jumper in place (between pins
1 & 3 on the XLR). Your amplifier will operate without the jumper
in place, but performance will be significantly diminished. You must
choose either XLR or RCA inputs it is not advised to try and run both
concurrently.
Now that the source component is connected, make sure there is no
signal coming from it, probably by turning the volume all the way
down.
With the speakers connected, push the front panel button to activate
the amplifier. The “Power” LED will come on.
the amplifier. The “Power” LED will come on.