Speaker problem, amp location?

[divinchi]

Hi guys,

First, let me say what I have, I have an 2002 3.0 with navi with no dsp. I have no idea where the amp is located on my system. I checked under the cd changer I also checked under the spare, so I have no idea where it may be. Any suggestions?

My next question, my rear speakers don't work, but the tweeters do, would they be blown or is there a problem with the amp? Is there anyway for me to check if it is the speakers?

Also, I don't have a sub, can I add one of the Bsw subs to my stereo as I plan to upgrade the whole speaker system soon.

Thanks for any info in advance