The Pyle PL42BL is a pair of round 4" two-way 180 W speakers that carry both the high and low end for a fuller range sound. The non-fatiguing butyl rubber surround keeps your speakers secure as well as extending the life of the product. A 3/4" high-temperature ASV voice coil provides the richest sound, ensuring low distortion and providing an open sound stage. The blue poly injection cone looks great and allows your music to resonate with full power. The 20 oz. magnet structure and 1/2" neodymium film dome tweeter are what power these speakers and allow for a 110 Hz - 20 kHz frequency response.