Good Luck....Laying down as a riser it would make a nice home for cats... until you turn it on.
Maybe some people have had a bad experience with home brew subs. I know I have. Bought one from a trusted forum member, He could not remember exactly what was in side but took a guess and then suggested I call the one who built it or take off the cover. Well I tried taking out the screws and still could not remove the cover. I called the builder and he thinks, maybe , kind of , possible he used the "wrong " type of material to seal the door and it possibly could have, maybe glued itself. I learned my lesson.... trust no one, check it out thoroughly, if it should come apart take it apart..... lesson learned. I have to go now time for my meds.