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Old 11-16-2016, 02:42 AM   #1
Junior Member
Brand: Thor Motor Coach
State: Oklahoma
Posts: 1
THOR #5942
Tv through overhead speakers

We have a 2013 Thor ace 30.1. We ran rca hook up from back of dash radio to main tv. The speaker under the slide works very well but the speaker closest to the tv has a hum and the sound is much quieter. Any ideas? when the radio is on all speakers work great.

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Old 11-16-2016, 11:45 AM   #2
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Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 9,416
THOR #1150
If you were getting the hum on both speakers I would think you have a ground loop induced from the 120V line (if the hum sounds like its around 60Hz that is probably the issue).

You can try something like this: Ground Loop Isolator (Amazon) and see if it kills the hum.
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Old 11-22-2016, 10:30 PM   #3
Brand: Thor Motor Coach
State: California
Posts: 38
THOR #5882
+1 for ground loop isolator on rca wires.

I am not sure of the speaker wiring and placement in the Ace but one quick test you can also try is swap the rca wires either on the tv end or the radio end to rule out a bad wire connection (see if the muffled/humming speaker also swaps ... assuming I understood your problem correctly).
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