Mazda Tribute head unit?
 

I have been looking at several brand new head units people are selling on eBay. There are plenty of the "premium" head units from the Tribute... double-din, 6-disc, cassette, 190 watts. The Tributes equipped with these head units have seven speakers... four mids, two tweeters, and a sub. What I want to know is if the Tribute has an amp elsewhere in the vehicle to send sound to all of these speakers, or if the head unit has the outputs already built in? Anyone know or have any ideas? Thanks!

BTW, I am also looking at a few Mazda OEM Bose head units. However, it appears the Bose speakers used with these units have seperate amps on each speaker. Is there a difference in the head units other than the Bose logo on them? Or is it the speakers/amps that make the difference?

Typicaly a car equipt with an amp will have a different harness to the head unit then one without I would bet neither the bose unit or tribute would simple plug into your protege and If they did it wouldn't work since you don't have the matching amp. these units just use regular wires for signal not RCAs.