Summary: I am building my first system, and choose to get two of these 8 inch Rockford due to space constraints in my crew cab Colorado. The subs sound awesome for being really under powered (planning on getting a bigger amp later) and being in a box that is definitely not the best shape for acoustics.
Pros: great sound, look cool
Cons: not the loudest subs, but they are only eights in a sealed box
Conclusion: I just put one of these in a ported enclosure behind the driver seat of my MR2 and am very satisfied with the results. The rubber surround is very thick and requires a break in period. I am amazed at how low of notes this 8" subwoofer can hit.
Summary: ok I will have to say that after getting burned by other sub manufacturers I found a set of power punch 8's back in the day and they SLAMMED> so now I get jbl gto's.BLOWN,pioneer.BLOWN,jl,WEAK,Alpine,kicker and Crunch. none could do as these lil guys do. they hit and sound AMAZING with out all that deep rumbling roll off you hear from the bigger subs, clean,adjustable,running fosgate T1000-1bdCP and they sing so well. get you a pair and you will be AMAZED!!!!