“If you have the OEM Sony system with sub, I have a 2018 F-350 Platinum, does this allow you to upgrade amp and sub? Fixes the Sony protection of bass turning down as the volume gets louder?”
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You can use the APSUB-FD21 to put in an aftermarket sub system in your truck with this pac harness. Very easy to install. I have installed these in several different vehicles for people that didn't want to change out their factory headunit. Its the perfect solution!
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