Box design credit goes to Chadderkdawg. My box was inspired by his posts showing his stuff and many thanks for sharing Chad!
I had previously installed a Kenwood DNX 6140 Head unit and Pioneer door speakers (speaker rings courtesy of HookedonTronics - thank you sir).
So, what is shown here is really just the sub and amp stuff.
Purchased from Sonic Electronix:
Rockford Fosgate R600-5 (5-ch amp: 50x4 and 200x1 RMS)
Rockford Fosgate Prime R1S410 10" sub
NVX XKit42 - 4 ga amp kit (sep bought 2 extra signal cables and extra 25' of 16ga speaker wire)
Total was: $386.51
Purchased from Lowes:
(1) 4'x8' sheet of 3/4" MDF (which I had them cut 3x to (4) 2'x4' pieces)
5 lb. box 2" ext sheetrock screws
Titebond wood glue
(1) Tube of Silicone
Total: (lost receipt, but it was around $50)
That's all the files I could upload, so will continue in next post.