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So I still need to test at the head unit, but after doing a little research, I have a question. I put a relay in as advised. Should a relay have been installed from the beginning? And one function of the relay seems to be to protect the remote signal of the head unit from being damaged. Since I paid an installer for the amp install, is this something that should have been done as part of a multiple amp install, or would it be something I would request?
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