Originally Posted by CADOBHuK
freeflap, have you tried comparing the max undistorted output of 1 a7s to the ep500?
no. that is not a relevant test of the sub and not of real world value; rather just for bragging rights, IMO. (My gut impression is that the A7s is clearly more powerful than the EP500, and it should be with a 18" vs 12" driver and almost triple the power, but i didn't do any SPL measurements to back that statement up with)
at higher volumes, however +100db, the noise from the port on my EP500 was audible like "breathing" or described here as "chuffing". that is something the sealed / PR units would likely never do.
remember, ALL of these subs here are capable of scaring the children and finally convincing your neighbor his b*se sat/sub system is comical. i prefer to think that we are beyond the "which is louder" argument and get into the more important quality discussions, which of course, are hard to measure and put a number to.