My NS 5000's are on casters I sized to screw into the spike location on the stands. It provides useful 3 inch lift. I have them connected to Red Dragon M500 monoblocks. Preamp/DAC for now is an Emotive XDA-3.
We visited the Yamaha Innovation Road museum in Hamamatsu, Japan. They have grand pianos costing multiples of NS 5000. But there is also a display of NS 5000 cut open and disassembled. Signage says the speaker was by a team of young engineers. It also displays the zylon (carbon fiber) driver material in different manufacturing stages. The woofer coil is literally one pound of copper. The back wave dampers look like tumble generators.
As you peruse the museum you notice the exhaustive research (world's largest musical instrument maker) in resonance with wood in violins, guitars, pianos, etc. Hence NS 5000's mitered joint plywood construction is deliberate.
Few names at any price point can match the research, resources, buying power, and pro audio ubiquity behind this speaker with its drivers all of the same material. It is not for flea watt amps. $15K is real money. Do your own research.