I had just bought his RSX a few days ago and it went with an aftermarket sub/boom box with the stock radio. I haven't check where they had wired the input signal for the amp and where they had grounded it. I will check the wirings where they had routed the + and ground wires and check if they had used the speaker signal to turn on the amp or is it connected to the ACC. Is the power ant wire is the output that comes out directly from the radio that is supposed to be used to activate / turnon the amp?
If I will replace the stock radio with an aftermarket? How will I remove the stock and if installing a new headunit/radio? How will I disable the radio theft alarm?
I will post back after I check the wirings of the sub and will try also to post pictures. Thanks a lot for the suggestions.