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 S - 3 0 0 i 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
o ff 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,
d i s t r i b u t o r, or Krell for suggestions on how to solve this
p r o b l e m .
How to Troubleshoot System Noise
2 6
Krell S-300i
