Eh, I'd put 2 ohm ones in anyway. Just worried that the factory amp would cause problems.

 

I have a 2003 Durango with Infinity with no amp. I pulled the speakers out today, and they are 6.75". I was told 6.5" would work by bestbuy and crutchfield, they will not fit my adaptor. I went to a stereo store and they showed me only 6.75" speakers fit. Anyone have any suggestions on what sounds good with factory head?

 

Can you tell us how you came up with this "superior" knowledge?