Aftermarket Sub Installation Planning / HK Amp Pinout?

JL Audio VX1000/5i. Its mounted down at the rear of the hatch next to the battery/spare tire.
 
So the only place I can seem to get full range sound for the subs is off the digital feed out of the head unit. Has anyone pulled sub information from one of the amplified outputs on the factory HK amp?
 
I've pulled mine off of the high level front door speaker leads.
I don't really have a way to tell if they have a low pass crossover on them though.
I get some additional bass but not a ton. Could be my setup though.

This is my install thread.
 
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Am I missing something here? That harness wiring diagram must not be for the 15 speaker HK system is it?
 
The image in post 12 and 16 is correct for the HK system. At least on my 2018.
The orientation is confusing, look carefully at the amp orientation. Connector A in the image is actually labeled with 2 on the harness. Connector B is labeled with 1.
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
Wanted to chime in... 2019 GT2 and the Subwoofer +/- pin outs were correct... and yes, the amp is mounted strangly. It's screwed in "toward you". If you've pulled the fuse panel and are looking at it it's backwards from what you would think. The "red" plug had the subwoofer outs that I needed. The blue plug has an ACC if you need +12v ignition/on.

Thanks a million for posting the pin out, saved me a ton of time trying to locate these. I'm using the subwoofer 1 & 2 as high level inputs to a Punch T750x1bd amp that has build-in LOC/auto-turn-on. Pushing two JL10w3's. The new amps are small and fit perfectly behind the spare tire.
 
Wanted to chime in... 2019 GT2 and the Subwoofer +/- pin outs were correct... and yes, the amp is mounted strangly. It's screwed in "toward you". If you've pulled the fuse panel and are looking at it it's backwards from what you would think. The "red" plug had the subwoofer outs that I needed. The blue plug has an ACC if you need +12v ignition/on.

Thanks a million for posting the pin out, saved me a ton of time trying to locate these. I'm using the subwoofer 1 & 2 as high level inputs to a Punch T750x1bd amp that has build-in LOC/auto-turn-on. Pushing two JL10w3's. The new amps are small and fit perfectly behind the spare tire.

Could you post a couple of pics?
 
Could you post a couple of pics?

Sure... here's a shot of the amp mounted and wired up. I didn't take a pics of the fuse/tapping but Theemfinger has some great shots and the schematic in the referenced 8" sub upgrade post.

20190804_104540.webp
 

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From interior to exterior to high performance - everything you need for your Stinger awaits you...
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