I have been planning a full on custom build out of my trunk but it wont happen for a while. I decided to temporarily hook up an old amp & pair of subwoofers yesterday. I was going to go buy an “amp wiring kit” when i decided to look around in my garage and see what i could come up with. I used liberty 14/4 for power/ground/trigger. Liberty 16/4 for speaker level to the subwoofers. And finally… a decade old pair of straightwire interconnects for line level from the head unit. It took me about 30 minutes, didnt cost a penny.
This should hold me over until i get ready to finish the trunk. I promise that this is “temporary” wiring as in… “i will actually wire it properly SOON” -vs- “this is how it will be for ten years” :).