difference of having a 4 channel amp?

specs: 2001 Honda Accord Kenwood 22RMS head unit 4 polk db651's powered by head unit 12"Alpine type x wired in parallel --> 2OHM load Alpine MRD-M1000, 1000RMS @ 2OHM My polks are being powered by a 22watt RMS headunit, so if i get say.... pioneer GM-6300F 60W x 4 Continuous Power (4 ohm) for my 4 ohm polk, what can I expect as a difference in clarity? Right now when the bass is hitting realy hard, the highs seem to be drowned out, will this amp fix it? my headlights dim with the system thats already in, so would adding 4 channel amp be detrimental to the alternator or car? If so would the 'big 3' fix this? last question, how in the world would I wire the 4 channel amp to my current system? does the 4 channel connect to the sub I have via rca cables or something, do I use a different metra? harness so that I can utilize the factory wiring to the polks, so I dont have to run wire through all the doors? Basically is there a tutorial somewhere on install a 4 channel amp, I couldnt find one. sorry for inundating you guys with questions, I just want to make sure if buying a 4 channel amp will be worth it, considering I have 1000 watts to the sub, but merely 22 watts to the speakers. thanks in advance! you guys are amazing

Add a 4 channel amp to this for sure. It will bring the speakers to life. You will need to add 2 more rca cables from the cd player to the new amp (provided your cd player has 3 preouts, front/rear/subwoofer). You ideally should be rewiring each speaker in the vehicle to the new amp. A 4 channel amp is not going to draw a boatload of current , the only way for you to know how it will affect the electrical system is to hook it up and find out. Given that though, the big 3 is always a good idea and I recommend that you do it.Top Secret, I can tell you but then my wife will kill me.

this is the back of my headunit, do i have to split the RCA's for the amp sub and the 4 channel sub? The only thing I have on the headunit is 1 pair of RCA out so uhhhh what do i do?

i dont have the kdc-mp238, therefore i do not have the front preout, only the rear preout, so do i have to split those, for the two amps?

What is the make/model of your head unit?Support the12volt.com

kenwood kdc-138 user manual: http://akamaipix.crutchfield.com/Manuals/113/113KDC138.PDF I got the image from there, if you have time please check it out :)

for clarification,this is the amp i want to purchase which will be supplying 60 watts x 4 @4ohm, which is a perfect match for my polks running at 4 ohms http://www.amazon.com/Pioneer-GM-6300F-4-Channel-600-Watt-Amplifier/dp/B000LYAZ5Athanks again, if you need any more info just ask.

It does have the 2/4 Channel selector on the amp.  You can use the single output of your deck to send signal to all 4 of these channels and the amp will in turn send signal to your sub amp.  

this is almost exactly what I did yesterday except for I used a 2 channel amp, my highs sound ALOT better,  I am only running 500 watts to the back and 100 to the front but I think I may need to do the big 3 and  a new alternator next