That would be an interesting comparison indeed. Unfortunately, I don't know too many people who have heard them side by side. I think the EP600 would be a more worthy comparison to the SVS PB12-Ultra/2.
I would suspect that the SVS PB12-Ultra/2 would eek out the the EP600. The SVS has another driver with more wattage. The Ultra/2 is also more expensive, so I guess you get what you pay for.
Though important, bass extension and SPL are only part of the equation. Do you have the resources to try them both out, and make the decision yourself?
