Summary: Greatest 8 inch sub I've ever heard! The factory sub in my car had blown and I had a difficult time finding a replacement sub! Never heard of Rockford until my buddy referred me! Sounds like I have a 10 inch in the trunk!!!
Conclusion: So I bought 2 of these, 1 for each vehicle I own. Firstly I want to say I've tried JL w3 & w1's, infinity and the MTX 8's. This by far is the best 8" I've ever owned! That's not to say a jlw7 won't beat this but that's a whole other price range. This thing hasn't been broken in yet and it POUNDS hard and low! I installed both of these 8's into a Digital Designs DDE-E1508 enclosure which I bought 2 locally for $150 and can't beat the quality!
Conclusion: I put this sub in my 18" long tube box in my regular 06 chevy colorado and man it hits hard u wouldnt even think it was an 8 people thought i had a 12" sub in my car the way it hit the amp and rms matched with the sub and i got hard hittin bass.
Conclusion: I got two of these subs to put in an old Subaru. I didn't want to take up too much space so I looked up the specks for them from Rockford and built two 0.65 cu. ft ported boxes tuned to 38 Hz. Got them hooked up to an old Rockford amp I had laying around, it pushes about 200w to each sub. All I can say is, WOW! These things hit hard and low. Never had any sub less than a 10 so I was shocked by how much they bumped.