If you have the Furrion radio in the entertainment center, it should have a way to select A/B speakers. The A speakers are likely the inside speakers and the B are likely the outside.
If you don't see it, perhaps you can take a picture of the unit and post it here?
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2022 Cedar Creek Champagne 38EL - "Big Bertha"
2019 GMC Sierra 3500 Denali HD 6.6L Duramax TD, CC, 4WD, DRW - "Mr. Beefy"
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