This Is A NEW Aftermarket 18 Woofer. 100 mm (4 in) copper voice coil. 35 1000 Hz response. Aluminium demodulating ring allows a very low distortion figure. Double silicone spider with optimized compliance. Ventilated voice coil gap for reduced power compression. Dual demodulation rings in the magnet system. Very low distortionnothing but deep, clean bass. […]... Read More