The SVS SB12 NSD is a relatively small, sealed, DSP based subwoofer. It would compare directly to the EP400. These subs have certain applications that work best in smallish type rooms using multiple subwoofers. Unfortunately I think you would asking that single sub to do too much to fill your 2600cu/ft room and since its sealed in that small of an enclosure you will not get that great of extension and output down towards 20hz. Perhaps a dual application might work better but then you will be hitting those price points of some bigger ported designs which will work much better for home theater IMO. Start saving those pennies...lol.
