Plus One Cone Architecture: Patented Plus One cones provide a superior membrane surface than other speakers of the same size. This design increases sensitivity and produces richer low frequencies with an assertive musical character. Edge-driven Silk Dome Tweeters: Equipped with silk dome tweeters with an "Edge-driven" design for a wider and smoother frequency response. This technology ensures crystal clear high-frequency sound without any hardness, regardless of volume. High Fidelity Audio Performance: This 165mm (6-1/2") speaker system delivers robust 90W RMS power and can reach 720W peak. Its frequency response ranges from 60 Hz to 20 kHz with a sensitivity of 90 dB. Stylish Infinity ID Design: Introduces a new, more elegant industrial design, designed specifically for sound enthusiasts wishing to enhance the style and acoustics of their original system. Complete System Content: The kit includes 2 speakers, 2 protective grilles, 2 19 mm (0.75") tweeters, 2 filter housings (crossover), threaded flush mount adapters, screws and fixing clips.