Hi
I have researched this extensively, and my conclusion was: Faital Pro 4fe32
- Well reviewed
Good sensitivity
Good off axis performance
Available in 4ohm, 8ohm, 16ohm
Great price
Will work in small box
You will not get great bass outside, so don't try, unless you want to build a boominator or similar.
There is a capacitor trick that can be used to simulate better bass if needed.
I am going to build a boombox with 4x 4FE32 (two on the front, and two on the rear).