What loving of hinge do i have need of? I want to make a hiding spot out of a subwoofer cage...

I want to make a hiding spot out of a subwoofer cage box. I am going to take the magnet cone ect. stale the back of the subwoofer. I want it to expand by sliding up and down. If that is possible. If not consequently i just necessitate a hinge that will be hidden. Any suggestions would backing. Thank you in credit.
Answers:    It would be easy to hold it slide off, but probably own visible creases. You can use a simple piano/utility hinge surrounded by the back, that would be undemanding.
Rent a safety deposit box at a guard. What you want to do is weird.