AudioControl LC6i Owner's Manual

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   Interfacing with factory-installed radio 
 Figure 5: LC6i system using summing functions – 2-way front plus subwoofer
Figure 6: Six channel system with LC6i and EQS
Speaker-Level Inputs
The LC6i is designed to accept an amplied, speaker-level signal from 
a factory source unit or amplier.  You will want to refer to a factory 
service manual or wiring-harness schematic to determine which wires 
are the speaker wires for your system. If you are unsure which wires 
are the speaker wires, it is recommended you look at the color of the 
speaker wire connected to the speakers and follow them back to the fac-
tory source or amplier.  Connect the speaker wires to the Speaker-Level 
Inputs on your LC6i.  Make sure to get your “pluses” and “minuses”  
connected properly.