Krell Industries KAV400xi - Manual (Page 23)

Krell KAV– 400xi 19
AC grounding becomes critical when connecting high performance
audio components. When you mix and match audio components,
each with its own ground potential, a low frequency hum may
occur in one or both loudspeakers. This sometimes occurs when
introducing a new component into a system.
If a low frequency hum emanates from the loudspeakers when you
place the KAV– 400xi amplifier into the system, follow these simple
troubleshooting steps:
1. Check all cable terminations, making sure they have solid sol-
der joints and are of sound construction.
2. With the amplifier off, remove the interconnect cables, then
turn the amplifier on. If the hum disappears, turn the amplifier
off and reinsert one of the interconnect cables. Turn the
amplifier back on. If the hum reappears with one or both
cables reinserted, there may be a defective cable. Have the
interconnect cables checked before proceeding.
3. If the interconnect cables are sound, you may be experiencing
a ground loop. Please contact your authorized Krell dealer,
distributor, or Krell for suggestions on how to solve this
problem.
How to Troubleshoot System Noise