The Kicker KS525 2005 speaker set includes two speakers that are capable of creating sound in a wide range of frequencies. This is because these Kicker speakers are both three-way speakers, which means that they have three speaker boxes, one a midrange speaker and another a .5-inch tweeter for music in the highest frequencies. The tweeter in these car speakers is a semi-dome style tweeter, and the woofer is made of a special plastic with a santoprene woofer surround. These materials make it possible for the Kicker KS525 2005 speakers to withstand any damage that may be sustained from extended use. These Kicker speakers have a shallow mounting depth of 2.31 inches, which means that they can be installed in many places throughout a car, including the doors for many models. Along with this, these car speakers are 5.25 inches in diameter, which means that when they are installed, they will be unobtrusive. Because these Kicker speakers have so many different features, they are capable of creating powerful sound in a wide range of frequencies for a memorable audio experience.