He was recommending the jl audio stealthbox because its easier to install when you don't have dsp already. Much easier.
Plus it sounds a 100000 times better.
To use what you got go here and it has all the information you need.
https://xoutpost.com/articles/x5/ste...ctory-amp.html
Remember your vehicle isn't wired for the thing so your going to have to run the wires yourself.