High quality midrange/midbass speaker with many top class features. The ultra-lightweight copper coated coil allows for a musical and accurate sound with the integrated Faraday ring on the VC to smooth the response. Indy XM also features a dual roll treated cloth surround, a coated dimpled textured surface to the cone that acts to increase the effective piston area to move more air and a CNC machined bullet phase plug to further hone response. These are great for small or large door builds in car. If the speaker is installed in an enclosure we advise a sealed setup to avoid the excursion peak that affects ported enclosures. Indy XM offers tremendous bandwidth, musicality and surprisingly good mid bass performance. It also has excellent detailed documentation making it easy to set up and use.