ok so i have a few questions. I blew my front door speaker in my 02 ram, it has the factory infinity system in it. I was just planning on replacing the 4 door speakers in the front and rear with 4 ohm speakers. Is it okay to replace 2 ohm speakers with 4 ohm speakers? the speakers i wanted to put in the front door are co-axial. Will it only produce bass like the factory speaker did? Im putting in my dual 12' mtx jackhammers and my mono sub in so i dont want the front speakers to only produce bass, i dont need any more bass when i put in my subs. also, i have an aftermarket headunit, the jvc kd-r438. when i wire up my new amp the the headunit will i have a problem with the factory infinity amp? is it also attached to the headunit? will i need to purchase an rca adapter to connect both amps to the headunit?