Purist Audio Design performs extensive research and testing that gets down to the heart and soul of a product. At this most basic, yet extremely crucial, level is the raw materials. The first key was the choice of precious metals and alloys to be used for the conductors. We look at not only capacitance, inductance, and resistance, but also magnetic fields. That is why we use alloys for our conductors, rather than simple copper or silver alone for the ultimate in sonic quality and performance. Purist Audio Design also looks at the dielectric as well as shielding. We like to think we have the most advanced shielding in the industry. Purist Audio Design products are outstanding at operating with minimal interference such as RF (Radio Frequency) and EMI/EMF (Electromagnetic Interference and Fields).