I worked with [MENTION=5751]letitreign[/MENTION] on building sub boxes for our little Pioneer subs which worked out quite well - easy to install for sure.
The only issue I had was getting the LOC to work as the one I ordered off Amazon didn't work - off to the local shop and I was $60 poorer.
Tapping in to the front speaker at the passenger side kick panel - orange with white and purple with white. Easily identified as they're twisted together.
Adding the wiring to the battery
Running down the side of the car
Tapping the fuse block for a circuit that was on / off with ignition - used to turn on the amp
Install done - this was before it was carpeted and I ended up changing out the amp to a Pioneer unit as this MTX one was not cooperating.