Conclusion: I love the midrange and directional tweeters on these. I put 4 of these in a 2010 ford f150 fx4 super crew. It was an upgrade of sound overall really hear all the highs and midrange off of factory head unit. The lows are lacking for what I'm looking for, but I don't have these amplified and have no sub.
Summary: Bought these to replace stock speakers in 2008 Mazda Tribute. These are a great factory replacement on a budget. No modifications were needed to install. The sound quality paired with Pioneer AVH-X3500BHS is pretty amazing. Did notice distortion at higher volumes with music with a lot of bass though. Overall I don't think you'll be dissatisfied with this purchase.
Summary: Second set of Infinity Reference speakers I've owned. As such I knew what kind of quality to expect from the product. Great mids and highs, bass could be slightly better, but short of having subs I don't know that I've had a set of speakers perform this well, and who can argue with a buy 1, get 1 price?
Summary: These speakers surprised me by how well they performed, particularly for the price. They're not perfect, but they do a fantastic job of faithfully reproducing the intended sound. The (not so) bad: At upper volumes there exists some distortion, particularly in the upper vocal range (picky ear). Lower frequencies normally found is lacking. The good: Very clean, accurate sound, which allowed me to hear much more of the soundstage, with greater detail and fullness.
Summary: I had a problem with one of the speakers not being glued properly to the speaker frame. Crutchfield was excellent and got out a new pair to me. The sound is fantastic! I'm using the stock Ford Nav/Shaker system. Note: as others here have noted as well, you have to cut off two metal tabs on the frame for it to fit.
Pros: Fantastic sound from the stock head unit. Great speakers for a great price!
Summary: These were used to upgrade Ford factory speakers which were poor at best. They were a nice drop-in upgrade for my Ford system with Sirius radio. The stock speakers sort of made Sirius radio a waste of money, now it will be much more enjoyable. The improvement in sound quality is just amazing. I enjoy a wide range of music like 50's, 60's, 70's, Rock, The Blues and Smooth Jazz.
Pros: Crutchfield provided the excellent support documentation and nice wiring harness adapters to make it the upgrade very easy to perform.
Summary: These are GREAT sounding speakers. The highs are crisp and clear, the bass is rich and full. I replaced the original factory Infinity's with these because of extensive research into every spec. Crutchfield offered. These speakers will more than satisfy your expectations. I've waited 14 years to replace the factory speakers and I wish I did it sooner. I missed out on a lot of audio pleasure!
Pros: Great audio detail, easy install, adjustable tweeter angle, great reputation.