For a while I was skeptical I couldn't decide I was back n forth for the longest! I use to have 3 Rockford P3 12s n that was knocking. I bought one RE Audio SXX 12 2ohm this is amazing! Have the hifonics Brutus 1200 watt amp. I just got it install Friday in my 08 charger I see ppl gettin 2 3 n 4 12s man that's for the birds all you need is one of these I promise you wont be disappointed! Just make sure you get a box for the cubic ft I recommend upgrading the big 3 for the highest performance but if you can't then you'll be ok! This knocks I have ppl thinkin I have 2 or 3 12s!! BUY this sub! Thanks Sonic Elextronix!!