I was really impressed with these subs! When the salesman took me over to these subwoofers I never heard of I was doubting them. Boy was I wrong. These subs BanG Hard! The Bass is incredible! Especially when I upgraded from the diamond mono amp DMD 1000.1 mono to the Rockford Fosgate R2 Prime 1,200x1 mono amp and it pushes them flawlessly! I strongly recommend these subs, underrated! I think I will try buying another pair but 12's this time!!