https://www.amazon.com/Silverado-Ex...chevy+sub+box&qid=1551241769&s=gateway&sr=8-4
I'll just leave this here
. It's the same box
@RawbDidIt posted but from amazon. Made by a company called American Sound Connection. I currently have this under my backseat. They offer dual 10 and dual 12 downfiring. I have seen a few upfiring but I would not recommend them as they would hit the bottom of the seats.
Also these boxes really need something to sit on to lift them up just a little for full clearance so I just put a few woodblocks under it. My amp for the subs is under the passenger seat, but could easily mount on the box if you wanted to do that.
Also would not recommend shallow mount... I am running two full size 2.5" magnet subs. They are amazing.
Don't understand the 5 channel idea maybe you can explain.. really need a mono for just the subs.
Like stated above don't cheap out on audio because they're all firehazards.