Update time. When we got the EP-600 in, as stated earlier, we had a pair of SVS PB12-Ultra/2's.

We also have been beta-testing the new Velodyne SMS-1, which was hooked up to the SVS. The SMS-1 has been hooked up to the EP-600 for the past two weeks, and we have done a lot of switching between the SVS pair and the EP-600.

Both subwoofers are capable of shaking the room with ease. That being said, the EP-600 is, IMO, a superior reproducer of bass when compared to the SVS. It has a way of responding to bass spectaculars that the SVS misses.

In the past three days, we have watched "The Italian Job", "Constantine", "The Matrix", and "The Fifth Element".

The two subwoofers are equal as far as force on scenes like the explosion which drops the safe into the water early on in "Italian Job", but the EP-600 hits harder in the chest. And when Charlie hits Steve in the restaurant scene, the SVS gives a thud, while the EP-600 give a SMACK that you feel.

This performance repeats itself in other movies, and on music as well.

For now, I will go on record as saying the EP-600 is a better bass machine than is the PB12-Ultra pair, with this caveat: To be REALLY certain, I will be running them both nearfield, to make sure it is not the room which is the deciding factor.