The mechanical structure of the SPU 90th Anniversary cartridge has also been re-engineered, as well as many of its internal assemblies. At the mechanical heart lies the , a revolutionary customized Selective Laser Melting (SLM) manufacturing technique in which micro particles are laser-welded together, layer by layer. This high technology and high precision process eschews traditional techniques to provide high rigidity and a body density resulting in the further reduction of unwanted resonances while still maintaining exacting figures for cartridge mass. 

SLM manufacturing also enables the consolidation of components to allow for a design devoid of unnecessary material. 

Another first is the inclusion of the renowned Field Stabilizing Element (FSE) system, which consists of a small cylinder of conductive material placed strategically inside of the magnetic system. FSE guarantees that the force field within the system will remain stable at all times regardless of the moment of the armature.

This technology was first introduced by recently-retired chief engineer Per Windfeld in his widely acclaimed Kontrapunkt series. What this means in practical application is that not only will the FSE minimize dynamic and intermodulation distortion, but it also will allow for greater dynamics, absolute clarity, and depth of sound for truly awe inspiring sonic performance.