dude they sounded great on rock, but i put on some decaf... lol and away they go... and you know i might have clipped a little... but no way should they be doing that on less than their rms, i treated the same as the kenwoods and kenwoods rating was only 400 rms, but played deeper and took more torture, if someone buys them and takes care of them i'm sure they will be happy, but a person like me that goes through systems about every 2 months, these are subs you drop in baby and someone has to be satisfied with their output and not try to push 'em....