but I think two 500 watt ported subs will out perform a 1000 watt sealed subwoofer. Sure the sealed box can deliver lower bass, but I'm thinking that the 19 hz that the EP500's go down to will be sufficient.
There is no substitute for digging even deeper, you feel it more.
Now I'm wondering if two main towers will be enough?.....So I'm almost wondering if 1000 watts worth of bass is going to drown out the 330 watts coming out of the front main speakers? From everything I've read about them they play exceptionally loud though, so I guess we'll see.
Once you have everything calibrated the sub should be blending in with the mains and other speakers, and will never overpower them. you just get to feel it more over the entire floor space with 2 subs opposed to one which can leave dead spots in a room.