Country of origin : Japan
The basic principles are no magnets or coils to to hinder the smooth running of the lower moving mass. A LED using infra-red and photo cells picks up the difference in brightness. Very similar in many respects to a photo-electric cartridge design from some 40 years back.
Each DS cartridge comes with its own unique phono equalisation stage, which changing the optical signal into an analogue signal, which can then be plugged into any line level input.
We have exclusive rights to these cartridges in the Midlands and are happy to demonstrate to vinyl enthusiasts.