Speaker make "pop" noise when pre amp turn off


Hi,
Does anyone have any idea what cause the speakers to make a "poping" sound when the pre amp is turn off?
Any remedies to this? It sounds fine when all the componet are on. The system does not have a hum problem. This only happen when the pre amp is turn off, or the amp turn off with the pre amp off?
Anyone has any idea?
Thanks.
gengisq

Showing 1 response by jcaudio