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So, I have a Cobra 25LX, that I keep as a backup on my truck. The company split my wife and I into separate trucks, so we could get an abandoned unit back home.


I put that 25 in the other truck, and found that the speaker wasn't working.  Temporarily, I ran the the audio through the truck stereo through the ext. speaker jack and the aux jack on the truck.  That works.


Stopped a few miles up the road, bought an external speaker. That didn't work.  Took speaker back, traded it for another. That also doesn't work.


So. Any idea what's causing this issue?