The TR350-CXi is a perfect drop-in replacement for vehicles that require a 3.5-inch speaker. Designed for smooth, balanced output above 130 Hz and capable of handling the power of today"s high-powered head units or a small amplifier, the TR350-CXi will impress you with its big, bold sound. A smooth-sounding 1/2-inch textile dome tweeter with ferrofluid cooling and a neodymium magnet delivers smooth, accurate high-frequency response. Injection-molded, mica-filled, polypropylene woofer.