The upgraded JBL sound system inclues an in-dash 6 disc CD changer, 9 speakers and an amplifier. The standard sound system has a single CD and 6 speakers. The additional 3 speakers are tweeters located in the rear doors (2) and a small sub woofer located on top of the Multi-Function Display (MFD). The amplifier is located under the passenger front seat. Some 2004-2005 models may also have a cassette player. 2006-2009 models include Aux Input Miniplug.