it depends if the speakers are wired in parallel or series.
if you're talking about the standard speakers, they are wired in parallel.
that means you will be getting double the output from the speakers (louder) than if they were wired up seperately.
wiring in parallel means the impedance on each front channel will be halfed. usually this would be dangerous for the headunit's internal amp (needs 4 ohms and would only see 2 ohms), however i believe the front speakers are all 8ohm drivers, meaning the headunit's amp sees the usual 4ohm impedance on each front channel same as if there was only 1 normal car speaker on each channel.
what does all this mean?
firstly, wattage isnt shared, you need to understand impedance and current to understand how a speaker is powered and will draw on the amp.
if you "make all the wattage go to the door speakers" what you will actually be doing is doubling the impedance in each front channel, greatly reducing the output on each speaker. obviously you dont want to do that.
also, if you remove the tweeter, you will also be removing the only speaker in the front capable of producing high frequencies, completely ruining the sound up front.
in summary, you'll half your output and remove your high frequencies, so dont be silly, just leave the tweeters alone.
