Summary: I recently had to purchase these r2 subs after switching vehicles and my p3 rocksford's wouldn't fit under my seat , and I was a little doubtful that they would sound anything like my p3's but once I hooked them up and played a bass test cd I made all that doubt went away. These speakers sound really good in my custom built ported down firing enclosure wired at 1ohm. Just goes to prove why I will never diverge from Rockford fosgates quality.
Pros: Will fit in a small box and sound great if u have the correct air space and they are wired right.
Summary: I was concerned this subwoofer wouldn't sound as good because it is the shallow design. I was wrong. I built a downward facing sealed box that was only 6" deep so it could sit under my back seat. It sounds absolutely awesome. I did give it the recommended .9 cubic feet of air space, and I sealed the box well. This thing gives me as much bass as I could ever dream of, and even more if I ever wanted any.
Pros: Awesome sound. Thin size, so it fits under/behind seats.