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JBL Marine Audio Wired Remote Questions & Answers
I have a jbl mr-145
I have the same model stereo in a brand new hot tub that was having the same issue. To fix it all u need to do is pull the front cover off to access the pump controls and in there you will find a black box where a power cable runs yo the stereo. There are two screws that open a little door in the black box. In there you will need a small flat head screwdriver to move a redswit over to the 110 volts position. Turn the radio on and it should work. That black box just controls the power to the stereo.
Speakers let out a loud screeching noise
Sounds to me like the radio itself is defaulty. You said you just purchased it, what kind of warranty did your boat have? More then likely the radio would fall under bad electrical wiring and a replacement of the radio would fall under that. I would demand the person that sold it to you, that same radio in an other boat, and prove to you that it does the same.
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