Polk Audio SR5250

The Polk Audio SR5250 Signature Reference Series is a 5 1/4" speaker system that is designed to give high performance cars a high performance sound to match.  The SR5250 system can either be used as a component system, or as a high quality coaxial speaker. The system includes different mounting plates to accomodate most standard mounting styles which can be used in coaxial speaker mounting or as a component speaker. The crossover can be set to 4 different tweeter levels (+1, 0, -1.5, -3) with a 2nd order low-pass filter and a 3rd order high-pass.  The 5 1/4" drivers use aerated polypropylene cones, have butyl rubber dampers, a 1 1/2” Voice Coil and are mounted in a die cast aluminum basket with vent holes to allow pressure equalization on both sides of the cone.  Features such as a small Neo magnet, U.S. & Euro hole patterns, 2 1/2" mounting depth plus supplied spacer rings ensure easy installation into a wide variety of cars.  The 22mm ring tweeter, which uses a neodymium motor structure with farraday cap, is usually found in high-end home speakers and is capable has a top-end frequency response beyond 40kHz.