The NB-Multiframe S series is a groundbreaking high-tech chassis for compact fans. The modular chassis concept with structure-borne sound absorber makes the almost vibrationfree operation of a fan possible for the first time. The achievable noise reduction of up to 30% far outclasses any other low-noise technology. The NB-Multiframe S series also has other interesting features. These include the noiseless NB-NanoSLI bearing, the improved NB-EKA drive and aerodynamic optimizations. The elimination of mechanical vibrations from strongly vibrating components is without doubt one of the most effective methods of reducing noise levels. With NB-Multiframe technology you are able to successfully transfer and optimize this principle to computer fans.