The K 170 Uno system features a 24 mm (0.9ˈ) diaphragm Neodymium tweeter with PEI dome, for a brilliant reproduction of high frequencies in a compact size. The annular acoustic lens is optimized for exceptional off-axis performance, ensuring an accurate stereo image. The 6.7” woofers features a pressed-paper cone with foam surround, for high SPL and solid bass. The 25 mm(1ˈ) woofer voice coil driven by a high-flux density ferrite magnet offers a highly dynamic power handling for a powerful undistorted sound. The 6dB/Oct crossover is integrated on the tweeter wiring for an easy OEM upgrade.