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Question and Answer
Q. Should I leave the KAV-250a or KAV-250a/3 amplifier on at all times?
A. No. These amplifiers do not have a stand-by mode. Leaving them on at all times
would result in considerable heat output and power consumption. For best results, turn
the amplifier off when not in use, and allow a five minute warm-up after it is turned on.
See Amplifier Operation, on page 25.
Qo 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 all input and output connections and cables, making sure
they are of sound construction. See How to Troubleshoot System Noise, on page 26.
If the connections and cables are sound, you may be experiencing a ground loop. This
can often be easily eliminated. Please contact your authorized Krell dealer, distributor,
or Krell for suggestions on how to solve this problem.
Q. When I connect the amplifier to my system using the single-ended inputs, a loud
buzz comes from my loudspeakers. Is the amplifier broken?
A. Check that the shorting pins for the KAV-250a or KAV-250a/3 are inserted into the
XLR inputs (the unit is shipped with the pins in place). When using the single-ended
inputs, these shorting pins must be inserted between pins 1 and 3 to keep external
noise from corrupting the signal. For more information, see Connecting the KAV-250a
or KA V-250a/3 Amplifier to Your System, on page 14.
KAV-250a and KAV-250a/3 Am plifiers 27