how much power (wattage) does the stock deck produce in a 99 yukon?

[DENVERYUKON99]

Im having trouble with my stereo now that I have replaced all six speakers. granted I know that my new speakers are: 128 W 6.5 front each, 160 W 6.5 rear doors and 120 W 4X10 rear roof. all numbers are RMS not max. do i need to run an amp or a new deck or both?

 

[SunlitComet]

I would think about 20-35w rms per channel but they only had four channels. two speakers out of the six were fed by an add-on amp at the factory which used speaker-level inputs from the roof ones. the extra amp powered the rear doors.

---------- Post added at 10:47 PM ---------- Previous post was at 10:44 PM ----------

You would benefit from a proper amp more then a head unit at this point.tho finding a 4-input to 6 main speakers might be a chore to find.