Description : 25mm tweeter with 6.5”woofer coaxial speaker design. Underhung motor design with neodymium magnet to reach low thd (2nd, 3rd harmonic distortion). Bamboo fiber paper cone with durable rubber surround. Aluminum / magnesium alloy membrane with back chambers design to perform 800 up to 40khz. Suggested: Crossover point: 2.5K~3.5K Hz Applicable For : 2 Way Design, please refer to SUG2-25