That would get you close but I'm convinced my factory HU rolls off around 40hz even though it had a dedicated sub channel (which my LOC is connected to). I guess I can't say for sure until I swap it out for an aftermarket. Your results may vary.
get the Audiocontrol LC7i or LC8i. run all your high level leads (every speaker including your factory subs) into the unit that way you'll have a full signal out. than go into a Four.1 (you can use any other brand EQ, just my preference) that way you'll have 3 sets of RCAs out with some sort of sound processing. don't worry about the center channel, the factory did that so they could get some sort of imaging from the front stage since they put crap speakers and processors in the car.
If I get the lci7 what's the need of the four.1 ? I thought the lci7 did it all ?
what? do you even know how to use the volume knob on a radio? the LC7i is just a Line Out Converter like the LC6i except it has Accubass. the use of the LC7i is for the Accubass, the use of the LC8i is for the 8 channels of input. how is the OP going to get a full 20hz-20kHz signal from one LOC of a factory system that is actively crossed? he isn't. Sorry but you have no idea what you're talking about. OP have factory subs, center channel, components up front, which are all indicators of an OEM system that is actively crossed. a unit to do it all would be a LCQ-1 or DQ-61. OP would still need some sort of equalization to defeat the attenuated signal that will be generated at moderate volumes.
