Conclusion: I'm running these speakers in a 1QF per speaker which matches perfect. (sealed) These subs are being ran on a Hifonics 1000.1 monoblock amp. I have this amp and speakers running at 2ohms. I must say these speakers pound very hard and clear.
Conclusion: Was quite surprised in the sound quality and the difference in the bass that it produced compared to the difference surface design of my Rockfords. Personal fan of the type R but will def do for a replacement and for time being.
Conclusion: My brother had an older version of these subs in a 01 civic with a bandpass box.sounded AMAZING for the amount he paid. now they are hooked up to the garage sound system. and yes, the neighbors do complain.