I am trying to install a new amp for the subwoofer in an Accord Ex w/o Navi. My only question before I start the actual installation is the audio source for the pre-amp inputs. I have read threads that says 'tap the rear speaker wires' but what does that mean? Does that mean that I 'T' tap the wire so that it goes to the rear speakers AND go to the LOC? Or does that mean just go to the LOC -> AMP -> SUB and nothing connected to the rear speakers? I need a sure and safe way to use both the rear speakers and the subwoofer.

I have a mono amp and a four channel amp (really crappy because only 3 channels actually works). I am planning on hooking up only the mono amp to the sub but I will use the 'four' channel amp if needed to in order for the rear speakers to work.

Any help is appreciated and thank you very much in advance.