You knew that Pioneer manufacturers of the top speakers in the world, right? Everything that went into the experience of leading these oversized 6-1/2 "4-way, and you will immediately hear the results in your car. What does this mean for you?" Narrow, powerful bass and rich, natural sound character with great depth and strength of medium to high volume levels, humidity and extreme temperatures, to resist the thrash other speakers. Design TS-A1781R is a perfect fit for many GM and Chrysler vehicles and uses all the advantages of using a large cone for a stronger bass than a typical 6-1/2 "speaker. For additional installation compatibility, including a 3-hole adapter for use in many Chrysler vehicles.