Aurum Cantus G3 Si Aluminum Ribbon Tweeter G3Si is designed for large-scale OEM high-end speaker system manufacturers. G3Si is a middle type pure aluminum ribbon tweeter with world-class quality, and also have an attractive price. It is the best choice to match with your DVD-Audio/SACD new products! G3Si is characterized by: - Very light moving mass of aluminum ribbon (no heavy Kapton layer underneath), giving a very extended frequency response. - N45 NdFeB magnet (far superior to the N30 and N35 industry standards), for a 99dB/W/M high efficiency. G3Si is not only wide in horizontal dispersion, but also rich in harmonic, natural and elegant in timbre. It is fit for all types of music replay, especially an excellent performance when playing orchestral, pizzicato and percussive music. Technical data Rated impedance: 6 Ω Rated power: 50 W Sensitivity: 99dB/w/m Frequency range: 1400Hz－40KHz Dimension of aluminum ribbon(WLT): 8.5mm×100mm×0.01mm Shape of aluminum ribbon: wave Moving area of aluminum ribbon: 850mm2 Gap flux: 0.6 Tesla Frequency cut recommended: over 2300Hz Material of mounting faceplate: aluminum, CNC processing, surface with anodizing electroplating finish. Dimension of mounting faceplate: W74×H140×T4mm Outside dimension(WHD): 74×140×77 Weight: 1.33kg/pc