Originally Posted by skutman
I have just brought home my new Quicksilver. Been trying out all the systems. My speakers have a hum when I have either DVD or CD playing. In trying to find problem, I see references to "Univolt." Is this the battery charger and how could it be causing the problem?
This is an easy diagnostic procedure.
Unplug the trailer and run it on battery only. If it still hums, then your Stereo is the culprit. If it does not hum any longer, then it is likely the charger/converter.
Batteries deliver the ultimate DC power. Hum is usually caused by A/C power. A bad filter inside the converter/charger can cause A/C content in the D/C charging current, and manifest itself in an audio system hum.