A 14-in square interior is the measurement that matters here, because standard 12-in album sleeves stand upright in it with room to flip through rather than lying in a pile. Each of the two cubes carries 66 lbs, which is roughly what a packed row of records weighs, and the top plate takes another 66 lbs for a turntable or an amplifier. Wooden dowels seat the upper cube into the lower one so the stack behaves as one piece, and an anti-toppling device plus non-slip pads finish the setup.