I have had a lot of subs n my life but have been happy staying with brands like Rockford Fosgate and Kicker in fact was running 2 12" kicker comp vr subs on a Soundstream DTR2200 amp and was pretty happy ....until.... I saw some information on RE subs. I bought 2 of these and did not change any settings on the amp running these at 2 ohms and they BEAT SOOOO HARD. I get stared at everywhere i go and everyone who i give a demo to cannot believe how they sound so I would highly recommend these subs and Sonic Electronics is awesome to deal with i usually order on fridays and have everything by monday.