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2018 Yamaha Limited S E Audio upgrade

Really digging these new Polk M1. The color scheme fits my boat nicely. And they are crazy loud. I have 150 watts going to each speaker.
I just added MM1 to the swim platform on the same 2018 212LS with the stock stereo and the starboard side speaker only outputs from the tweeter, there’s no bass. I swapped the speakers the port side and the speaker works fine. Any suggestions from anyone?
 
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