I want to add an amp and subwoofer to my 2014 tsx with tech package. I took the car to a professional and asked him if he could just tap in to the amp and subwoofer that are already in the car so that he didn't have to go behind the dash or run any wires and he laughed at me and stated that this wasn't possible. Is he telling the truth or is this just a tactic to get more money out of me?
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