I have an '03 coupe w/ Bose. So I was thinking of changing out all six speakers and adding a sub. I've been thinking of using 6.5" Infinity Kappa components in the front, Infinity Kappa 3-ways in the back, and Infinity Kappa 6X9s 2 ways in the rear deck. I'm not sure what type sub yet, but something kinda small (maybe a JL 10W3). I realise that the Infinity speakers are 2 ohms, so with this setup would it be ok to use two 4 channel amps and bridge two on one amp for the sub? I was considering 4x300 Alpine amps because they have an RMS of 75 (I think) for 2 ohms and the Infinitys can handle 90. So 4 can run off of one fine, but the other two and the sub is where I'm trying to figure things out. Bridging two channels together will only give me 150w which seems kinda weak for a 10" sub, but if I go with a more powerful amp the Infinity's won't beable to handle the extra power. I'm completely new to this and open to any comments or suggestions. Thanks for any help.

 

it doesn't matter if the bose uses 2 Ohm output since your planning on using an external amplifier.
I wouldn't bother with the rear deck speakers since Infiniti uses them as Subs.
Do the door speakers and the rear sides and your good.

 

Thanks for the advice about the rear deck. And its the new Infintiy Kappa speakers that I am concerned about that are 2 ohms. Just don't want to overpower and ruin them.

 

I would reccommend also staying away from using the rear 6x9's. Pull out the factory units and leave the holes open, that way you get alot better low-end response from the subwoofer. It has a place to vent the sound. Also, I wouldn't worry about the ohm of the speakers, especially since you are using an aftermarket amplifier.