@ozzy62: I picked a cube in which all the LP’s were single discs in non-gatefold covers, and counted them. How many LP’s will fit in each EKET cube (and any other storage rack) will of course be determined by how thick your LP packages are, how tightly you pack each cube, and whether or not you have your LP’s in plastic sleeves.
A lot of my LP’s are installed in the double-pocket 4 mil thick sleeves made by the Canadian company Vinyl Storage Solutions (love ’em!). Others are in the 2 mil double pocket sleeves, with the rest in 3 mil and 4 mil thick single pocket sleeves. I don’t leave space in each cube for expansion, and fill each cube just snugly enough to keep the LP’s perfectly vertical, loose enough to make sliding them in and out easy.
The one cube I counted was filled with 65 LP’s, so the 4-cube model will hold 260 LP’s, assuming all of them are single LP’s in non-gatefold covers, installed in plastic sleeves, and packed firm but not tight. Of course LP’s and their covers not housed in plastic sleeves and packed tighter than I do will increase the number that will fit in each cube. And gatefold covers, double LP’s, and other variations may decrease the number that will fit in each cube.
I’ve never counted all my records, and have no plans to do so. My fifteen 4-cube EKET’s recently became completely full, so I will soon need to get a few more, and find a place to put them. (The left wall of my music room is just long enough for the five stacks of EKET’s and a stack of ASC TubeTraps---16" on the bottom, 11" on top. The right wall is filled with six CD racks---two high, three wide, with a storage capacity of 600 CD’s each. They too are completely full---and the same TubeTraps, plus a door.). Either that or stop buying records! I also have a couple cheap 2-cube racks I got off Amazon, in which I store my Laserdiscs. Anybody else still have their’s?!