Hmmmm, I can't say this surprises me that much. Being a former SVS PC-Ultra owner I can say without a doubt that the Ultra driver is fantastic but it's not everything. My current HSU is a vastly better performer with music. I would however liked to have seen his thoughts with one SVS going up against the 600.

A very interesting read. I would love to try the 600 but the PC-Ultra went as a result of it's size so there is no point in trying the 600. That and the fact that I still don't have one complaint with my HSU!