For an update, we are getting SERIOUS about working over the EP-600. Last night, it as "Star Wars", and this morning we watched "The Matrix".
The EP-600 seems to be tuned to the 18 Hz - and from that point and up, it delivers HUGE amounts of bass.
There is a lot of physics going on with this subwoofer, and some really intelligent choices. Take a large enclosure (appx 5.5 cubic feet), put in a high excursion driver, a large port with that 18 Hz tuning frequency and combine it with a sensible DSP set up which makes it bullet proof.
On "The Matrix", it handled everything tossed at it. During the Helicopter scene, the room was TOTALLY pressurized, yet the bass managed to not cause the type of wall vibrations the SVS PB12-Ultra does. The combo of having the sub driver WELL off the floor, and the one inch thick rubber feet give the EP-600 the same benefit we realized by putting the SVS PB12-Ultra on a "sub-Dude", which is $50.
For an EP-600 "deal", if you look at a "B" stock, the price becomes $1575 delivered. ( $1750 less 10%) ...
A wood finished Ultra with sub-dude is $1448 delivered, with "B" stock $50 less - $1398.
They are natural competitors, for sure.
This is shaping up as a GREAT shootout.
Remember, this is a HOBBY