Dodge dakota infinity replacment speakers?

In my -98 Dakota Extended Cab the speakers are same the size both in the door and the back.
These are the ones I´m going to use. http://caraudiosecurity.com/shop/product/products_id/12141.html
I´ve read some where on the net that the stock ones are 2 ohm speakers.
I put the meter on + and - on the speaker and it showed 2 ohm. Not sure though if that is the accurate way to meassure the ohm on a speaker.