I was pretty happy with the Mopar Kicker speaker and amp upgrade, but I thought the system needed some help in the bass department. The Kicker sub was difficult to find and expensive for what it was, so I decided to go my own way and design something unobtrusive.
I had a few requirements when I started out. It needed to fit below the cargo cover, not block the cargo tray in the floor, be easily removed for cargo room, and look stock.
I started out by figuring out what sub I was going to go with and decided on the JL 10w6v2. I next took some measurements and designed a box that would meet my requirements and also provide the volume spec'd by JL. This is what I ended up with:
Next, I built the box and test fit it in the Jeep:
For mounting, I decided I would hook the box in to the LATCH anchor on the seat like the Mopar sub. I modified a piece of fence hardware to do the job.
You can't see in the photos, but I also mounted low profile rubber feet and a carry strap to the box so it would be more portable.
Since I wanted to be able to remove the box quickly, I needed a simple way to disconnect the wiring. The first idea was banana plugs, but I wanted something that couldn't short when left disconnected. I decided to go with a SpeakOn connector designed for PA and DJ gear and mated it to some two channel 12AWG speaker cable from KnuKonceptz
To interface the JL 500/1 amp with the stock system, I connected an AudioControl LC2i to the rear door speakers. I had planned to hide a switch somewhere so I could disable the amp when the box was removed. Since the connector has four terminals and I only needed two, I decided to make use of it instead. I hooked one pair of wires between the LC2i remote output and the 500/1 input. I tied that pair of terminals together inside the box so the circuit would be closed when the box was plugged in but open otherwise.
I hid the amp and LOC in the cargo tray cutout and am really happy with how everything looks and sounds.