Specifications

• In case there is hum or ground noise, check that the RCA/XLR switch is in the correct position for the type of
connection being used.
• Ensure that the preamplifier or any source components are not producing hum by setting the preamplifier to a
MUTE or Standby setting.
• The design of the S125 reduces the chance for ground loop induced hum, but we still recommend
using shorter interconnect cables to the preamplifier. Connect all power cables to a common outlet box or
power conditioner unit to reduce the possibility for ground current noise being induced into the audio signal
path.
• If you choose to power your source and preamplifier components from a different AC supply than used for the
S125 amplifiers, we recommend that you use a high quality balanced XLR cable driven from a true balanced
XLR preamplifier output.
• We do not recommend that you resort to ‘cheater plugs’ or some other means to disconnect the power
ground from the S125 as this may lead to dangerous operation and void the warranty.
• The small blue LED lamp indicates that power is connected to the S125 and that the power switch is in the
ON position. If the amplifier detects a fault or short circuit in the output connections, it will go into a protection
mode and stop playing. If this occurs toggle the power switch to the OFF position and check the speaker
cabling to ensure that no speaker output is either shorted together or connected to a ground. When you are
certain that the loudspeaker cabling is correct, power the unit ON again, check that the blue LED is lit and that
music will play.
• There is an internal fuse protection on the S125. If the power switch is in the ON position, the power cable is
connected to a functioning power outlet at the correct voltage and the blue LED is not lit, this indicates that
the internal fuse may have blown. If this occurs contact your dealer, distributor or Bel Canto for service. There
are no user replaceable fuses or other parts. Opening the chassis will void your warranty.