Ok, so if my deck puts out 45 X 5 that means that there is a 180 watt amp inside it, so roughly it is putting out about 90 RMS which breaks up to about 22W RMS to each channel. Correct me if anything I am saying is wrong. So what happen if I only run 2 speakers off of the HU will it put all of the power into the 2 speakers that are remaining automatically or no? What I am getting at is if i have a pair of speaker that are rated for about 100 watts each and then a comp set that is rated at about 200 watts each could I have the internal amp power the lower wattage speakers and then get a little bigger amp to power the other set or will the internal amp still put out a weak 22 watts to each of the speakers. I feel like it may make a difference if it can put out close to 100 watts peak if its just 2 speakers. Please let me know if anything i have said is wrong, or any of the information I asked makes sense, TIA

 

The 15-20 watts per channel is all you will squeeze from the HU. You will need an amp if you want anything over 20 rms watts per channel with reasonable distortion.

PS peak rating does not mean much.

 

So how do I know if it can be bridged or not? Also, exactly how do you bridge something. Like Even it was an amp, how do you physically tell it to be bridged?

TIA