These subs sound great but I don't recommend them!! Although the sound is amazing, they don't hold up. I have a hifonics Brutus amp pushing 1000 Watts to both subs in a ported 3.0 cft box. They lasted about 4 months. The weak point on this sub is the voice coils; they are too small and don't hold up to prolonged beatings. I called Sonic Electronix and they told me they couldn't warranty a blown speaker.