Put the E.Q. between the pre amp and the main amp.
With a line output converter. Converts high level speaker outputs to low level line (RCA) inputs. Raptor install accessories part #LOCA25.
with ur hands
yes you can. i don't really know exactly how to do it, but my friend has it in his honda.
well it depends if there is rca jacks in the back....i hook mine up using the TV outputs but you can use phono which is ment for that and it just goes to a 3.5 mm headphone jack..