Rear door speakers

[ss6911]

I have a 1999 tahoe and i was wondering if the rear door speakers have a crossover built in the factory amp? thanks

 

[SunlitComet]

no way to know really with out a oscilloscope really. in the diagrams for the luxury sound system tw/ amp it is show just to be tweeters in the rr an lr but it does not specify doors specifically. also combo tweeter/speakers in front doors and rear of headliner. even then the tweeter branches off the speaker terminals so the tweeter likely has its own filter soldered right in to the tweeter itself, that amp also has a sub-woofer output on it so obviously there is a filter/crossover for that in the amp on the standard radio with w/amp only the front doors have a tweeter and wired in the some way.