If you're asking I assume you just have the regular stereo system and not the JBL system, the JBL system is clearly marked on the radio and the 2 lower front door speakers, it also has 10 speakers, one on the dash, 2 in each front doors, one in each rear door, 2 small speakers and the sub-woofer in the cargo area.
Also most all of the radios have a model number on the face plate somewhere, which you can do a Google search for that number to know what you have.