Running them off an amp however they sound like 6 by 9's in the door with perfect sound quality, and at such a cheap price I was very impressed!
http://cgi.ebay.co.uk/JBL-180W-16cm-6-5-INCH-2-WAY-CAR-DOOR-SPEAKERS-NEW_W0QQitemZ350338094762QQcmdZViewItemQQptZUK_Audio_TV_Electronics_In_Car_Entertainment_GPS_Car_Speakers_PP?hash=item5191c716aa
£30.00 all in, cant go wrong.
I am running a 10 inch Vibe active sub too, so just front door speakers and the sub and it sounds spot on in the front (fitting matching 6 by 9's later).
I had some more powerful FLI ones before which sounded half as powerful and half the sound quality.