Get ready for a seriously upgraded sound quality – even when used with a factory fitted stereo. The In Phase XTC 17.2 speaker system delivers 250 watts of peak power, with rich, sharp and crystal-clear sound. The smart adjustable design of the 6.5” speakers enables you to focus the sound on your required listening angle. Thanks to the high quality powered and coated speaker chassis, which dampens distortion and gives more detail, and the glass fibre woven cone which adds rigidity and strength, you can expect a much cleaner, sharper sound with a much more powerful bass response. British DesignAll In Phase SPX, XTC and SXT speakers are designed in the UK utilising over 30 years of audio experience to create a sound that is right for you. Coaxial DesignCoaxial speakers or full range speakers as they are also known as offer higher quality sound than their dual cone counterparts. The tweet at the helm of the cone allows higher end frequencies (high notes) to be distributed out. This also does not require a separate crossover to fit them. Glass Fibre Woven Cone, Butyl Rubber surround and Aluminium ChassisGlass Fibre is a high mechanical strength fibre which has many applications. Used in tent poles, speakers, boat hulls and much more. This material will offer endurance as well as high end performance for a speaker. The 10-ounce magnet allows perfect bass response not normally heard in a 17cm speaker Medium to Semi High PowerThese speakers allow up to 60W RMS to each speaker and 250W peak power for both. Which is fairly high for a 17cm speaker! These speakers can be run on your head unit or via a separate amplifier. These speakers do offer a but more than the Pioneer TS-A1670F and Alpine SPG-17C2. Additional Information 250 watts peak power handling 60 watts (RMS) input power Stronger glass fibre woven cone Rubber surround absorbs vibrations Sensitivity (1W/1m) 90dB Powered coated dampener speaker chassis Frequency response 35hz - 25khz Directional rotational tweeter Speaker size 17cm Mounting depth 62.1mm Woofer magnet 10.97oz fixings and instructions Perfect finish and attractive styling NOTE: These speakers come in pairs.