The speakers are designed to provide smooth quality sound and a balanced output at audio levels above 130Hz. Each individual TR350-CXi speaker is made up of a high quality polypropylene cone body, and is injection-molded, mica-filled, has a symmetrical-roll spider, and is surrounded with a polyether foam material. Special features include a textile dome tweeter body shape complete with an integral phase plug, neodymium magnet, and each speaker is ferrofluid cooled and damped. The JL Audio TR350-CXi 3.5" woofer set currently has no listed release date and has an MSRP of $79.