question about amps.. 4 channels?

I'm a little confused. My 2013 double cab has 6 speakers. 2 rear, 4 front (the "tweeters" or whatever they're called now days).

I'm considering purchasing something like these:

Alpine KTP-445U Power Pack - 45w RMS x 4

Clarion XC1410 - 50w RMS x 4


I admittedly haven't bothered to pull the head unit to how things are set up. Do the four front speakers each have their own channel? Can I use one of the units above and just splice the front speakers in to the same channel? (meaning - the two left speakers together and the two right speakers togheter) I may also replace the speakers a couple of months down the road.

 

The tweeter and mid share a channel. So driver door is ch1 and passenger door CH 2 driver rear CH 3 and passenger rear CH 4

 

Thanks. That's what I was guessing... but didn't want to order something and be wrong.

 

You'll see a mild sound improvement but not much with stock speakers. I would invest in some new speakers when funds allow you too. Then you'll hear a difference.