I've had a pair of these subs and have gone back and fourth from ported to sealed. I'm running a brz1200.1d and loving the bass. I have gone from an Alpine 3522s (90w rms) to a kenwood kac-8205 (~300w rms over rated) to a memphis pr150.2 (200w rms VERY underated) to a rockford punch 601s (600w rms) and i must say now that im running a true 1200w amp and my whole system is cea compliant it is SO much louder. Don't be stingy and you wont regret it.