Right Speakers?

You can use higher ohm speakers with a lower ohm amp with no problems. They won't get as loud as a matched set of speakers would, but that is generally a non-issue. You will eventually have problems running lower ohm speakers with a higher ohm amp... at least that's what the stereo gurus say.

The specs on those speakers say they are 4 ohm. Your stereo might say somewhere on the case what impedance it is. Most car stereo stuff is 4 ohm, while most home stuff is 8 ohm. You shouldn't have anything to worry about.