The SPU 90th Anniversary and the MC A90 phono cartridges were thought as a celebration of a significant milestone in the Ortofon history and was the result of a of exhaustive research led by Ortofon’s Chief Officer of Acoustic and Technology, Leif Johannsen. The research incorporated the technological heritage of Ortofon with the new manufacturing technology called Rapid Manufacturing (RM).
The cooperation with the Danish Technological Institute originally began with experiments with the production of plastic items for cartridges in the Selective Laser Melting machine using the new RM technology. RM allows manufacture parts in different materials directly from 3D file. The RM technology has given us a bigger creative designing space, because we are no longer limited by a particular geometric shape. We do not produce tools, which means that the production process is reduced to a few weeks where it before took between 4 to 6 months. The time factor means that we can now try out our ideas, and it gives us an enormous amount of freedom.
A revolutionary customized Selective Laser Melting manufacturing procedure in which micro particles are laser-welded together, layer by layer, lies at the heart of the SPU A90 and the MC A90.
This high technology and high precision process eschews traditional techniques in order to provide an increased rigidity and body density, which gives an even bigger reduction of unwanted resonances while maintaining the exact figures for the cartridge mass.