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OK, so I just purchased a 2020 GMC Sierra SLT with the Bose Premium Sound system. At this point, this is where I am. Considering these speakers and enclosure: > https://www.jlaudio.com/collections/car-audio-stealthbox/products/sb-gm-slvcc4-12tw3-d8-car-audio-stealthbox-94668 * A little pricey, but hey JL Audio quality With this AMP: > https://www.jlaudio.com/products/xd400-4v2-car-audio-xdv2-amplifiers-98602 I need the schematic for the Bose Premium Sound system, what model Bose, information (all I can get), to include if possible the stock amp. Does this Head have a low signal output (for subs)??? Something else I found which was really interesting is (not to use the rear speakers for signal input)

Thinking I will build my own custom box, minus that, how did you guys get the signal to the sub-woofer. Did you cut into one of the rear speakers?