NB-Multiframe® S-Series 80mm Patented high-tech developed in Germany! With its own developed and patented (((Noiseblocker)))® technology, (((Noiseblocker)))® introduced a new era in fan construction in the year 2008. The Multiframe S series made by (((Noiseblocker)))®, which is generally recognised as the reference standard, is the first fan with a vibration-free fan frame and incorporates numerous other improvements, so that it is superior to standard fans in almost all aspects. In conjunction with the unique (((Noiseblocker)))® technology, our almost noise-free NB-NanoSLI® bearing and the NB-EKAPlus II drive, the NB-Multiframe® S series currently represents the best that German engineering expertise has to offer. Quality you can rely on! A unique, multipart vibration-free chassis with integrated structure-borne sound absorbers and glass fibre-reinforced frame Extremely low start voltage! Easy assembly NB-EKAPlus II wide-range drive with low impulse noise Verified technical data