There are those who believe that only the plug that connects to the wall outlet has to be grounded to provide protection for your circuitry. Use of multiple 3-pronged connecters into your conditoner or other intermediary components increases the chance of ground loop propagation.
Please refer to Michael Elliot's (Owner and designer of Counterpoint, now Altavistaaudio, electronics) recommendation:
http://www.altavistaaudio.com/hum.html
Please note that Mike beleives that if yoru problem is a ground loop issue no matter how expensive your line conditioner is it won't eliminate it.
I hope this help your situation.
I had two sources of hums in my system: one turned out to be inside the amp itself (xformer was oriented horizontally facing the audio circuits and emitted electronic picked up by the audio circuitry). This was fixed by the manufacturer.
The second source was ground loop also modulated by a dimmer controlled lights. Reducing the number of 3-pronged connectors eliminated 90 % of the hum but I still have a very minor hum.
keith
Please refer to Michael Elliot's (Owner and designer of Counterpoint, now Altavistaaudio, electronics) recommendation:
http://www.altavistaaudio.com/hum.html
Please note that Mike beleives that if yoru problem is a ground loop issue no matter how expensive your line conditioner is it won't eliminate it.
I hope this help your situation.
I had two sources of hums in my system: one turned out to be inside the amp itself (xformer was oriented horizontally facing the audio circuits and emitted electronic picked up by the audio circuitry). This was fixed by the manufacturer.
The second source was ground loop also modulated by a dimmer controlled lights. Reducing the number of 3-pronged connectors eliminated 90 % of the hum but I still have a very minor hum.
keith