Paolo,
If you can turn a screwdriver to remove some screws and remove 3 wire plugs from the supply. Remove 4 screws holding down the supply,
screw by hand 4 included standoffs, remove old supply, and steel cage, then install my supply, reversing the proceedure. If a Meridian user can tell Paolo If the Meridian has philips for the top cover or allen screws, and can tell him the size of the screws, I would apreciate that.

Done! easy!

Anthony