I understand how to hook up the front and rear channels but what do I hook up to it to go to bass amp, I only have 8 wires from the factory unit? My 4 channel amp does not have a output or pass through (Eclipse PA5422) so that method is out. what am I missing? Also does anyone make a connector that connects to the factory harness so I dont need to cut it? The car is a 2006 Taurus
http://rs.audiocontrol.com/company_38//LC6i Sales Note.pdf very bottom of page. it has a summing jumper. it will use the front and rear inputs for a bass output.