All our drivers are tailor-made masterpieces and handmade in Germany, to perfectly match with the cabinet and it's acoustic cavity, and guarantee the absolutely faultless interaction with the crossover. All drivers have been developed by using the latest technologies. The usage of CVD diamonds for our drivers in the high frequency range (the Tweeters) was a logical step. Ceramic is used for the mid-range drivers, and  Ceramic Sandwich technology is used for the bass units.