Questions And Answers - Krell Industries S-1500 Instructions For Use Manual

Questions and Answers

Note
When the amplifier is first plug-
ged in, there is a brief delay
before it can be put into the
operational mode. Please wait
approximately 10 seconds.
Krell S–1500 Multi-channel Amplifier
Q. Should I turn the S–1500 amplifier off (unplug the amplifier)
when not playing music?
A. No. Leave the S–1500 amplifier in the stand-by mode when
not playing music. The stand-by mode avoids cold starts as
well as minimizes heat output and power consumption. Turn
the amplifier off if you plan to be away for a period of time, for
example, on vacation. See Operating the S–1500 Amplifier,
on page 15.
Q. When I turn the amplifier on there is a loud hum through the
loudspeakers. What should I do?
A. When a new component is introduced, a low frequency hum
may occur in one or both loudspeakers. Check that all input and
output connections and cables are of sound construction. See
Troubleshooting System Noise, on page 16. If the connections
and cables are sound, you may be experiencing a ground loop.
This can often be easily eliminated. Please contact your autho-
rized Krell dealer, distributor, or Krell for suggestions.
Q. When I connect the amplifier to my system using the single-ended
inputs, a loud buzz comes from my loudspeakers. What is it?
A. Check that the shorting pins for the S–1500 amplifier are
inserted into the XLR inputs (the unit is shipped with the pins in
place). When using the single-ended inputs, shorting pins must
be inserted between pins 1 and 3 to keep external noise from
corrupting the signal. For more information, see Connecting
the S–1500 Amplifier to Your System, on page 13.
Q. I cannot turn the amplifier on. Why not?
A. Make sure the front panel LED is not flashing red. If it is flash-
ing red, unplug the amplifier from the AC wall receptacle and
then plug it back into the AC wall receptacle. If the LED contin-
ues to flash, contact your Krell-authorized dealer or distributor,
or Krell. If the LED is not illuminated, check the power cord and
check the AC mains fuse. To remove the fuse, unplug the
power cord from the amplifier and slide out the fuseholder.
Q. I get no signal from one of the amplifier channels when the unit
is on. Why not?
A. Make sure you are not connected to channels 6 or 7 on a
S –1500 / 5, or to channel 7 on a S–1500 / 6. If you are using
the single-ended input, make sure the shorting pin is inserted
between pins 1 and 3, and not between pins 2 and 3.
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