The base 4 speaker system in my '06 Ram 1500 left a bit to be desired, specifically when it came to speaker clarity. The bass was "loose" and too boomy, midtones were muddy, and treble almost non-existent. These speakers fixed all of these problems - bass is now tight and clean, midtones are no longer muddy, and the treble is sharp and clear. You'll notice that you won't have to crank up the volume as much with these speakers, as they seem to be more efficient than the stock units. Great for those of us on a budget and wanting to do incremental upgrades. I am currently using the factory "REF" stereo - it drives these speakers just fine. Be sure to use the spacers from the factory speakers, so that these speakers will clear the window when it's rolled down. I'm looking at replacing the rear speakers next, as it is very apparent how crummy those speakers are now. The closest thing to a "con": speaker clarity is so vastly improved that you'll notice when you're playing poor quality mp3s, or listening to the radio when the reception is less than optimal, even with the factory head unit. Some people may find these speakers are less responsive for bass than the factory speakers. You'll lose the "boominess" of the factory speakers, but will be rewarded with clear, accurate, and tight bass. I'm surprised at the bass notes I'm hearing in my music now. These notes used to get completely lost or muffled with the boomy factory speakers. I highly recommend these speakers!
Pros: Quick and easy drop-in speaker upgrade. Excellent speaker warmth and clarity. Well-suited for the base factory "REF" stereo's power. Tight bass, sharp treble, clean mid tones. More efficient use of power compared with the factory speakers.
Cons: You'll want to replace the rear factory speakers after hearing the improvement these make up in the front.