I am installing a powered subwoofer in my 2008 G35x w/ the Bose audio and the only thing I am unsure about is how I should go about doing the Output Connections... Will it be a Low Level RCA connection or a High Level connection? Where will I make the connection?

 

Yeah it will be a low level converter. The best line to tap would be the wires for the rear speakers on the input side of the Bose amp.

 

Use RCA's broski. Assuming you use a phone or bluetooth adapter ...
IF you split the source, run one to the armrest aux in , and run another to the amp ....
You can DIRECTLY CONTROL the sub level independent of the stock Bose mids and highs.

 

Do you happen to know which wires those are? I've been searching all over the place and see some people connected to the connector at the sub and others connecting at the amp. I would think you'd definitely want to tap into the wires at the amp, but can't figure out which wires to tap into. Installing the power and ground are a piece of cake. Determining which wires to tap into for the signal is what I'm trying to figure out. We're installing the Fosgate P300-10 powered subwoofer in a 2008 G35S Sedan.