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I read through some of the audio threads. I want to add a trunk subwoofer, but don't want a new head unit or take apart the dash at this time. In light of that, maybe someone can add insight to the below questions?:
1) I can tap into the audio signal wires coming to the stock rear amp, in order to provide a subwoofer with that same audio signal?
2) Is the above mentioned audio signal full spectrum at that point?
3) Is it better to ground the sub for the power return, or run a dedicated return line to the battery negative terminal?
4) How are people adding high-pass filtering to the door speakers after a sub install (since bass is no longer needed for the doors)?
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