I find it interesting that others use the Vandersteen 2wq subwoofers. I just traded in a pair against the 20.7s. I felt they were overly large, but there was a bigger problem.
I run a Rowland Continuum S2 integrated, with input from the DirectStream DAC. The HPB high pass filters for the Vandersteens were intended to be placed between a pre- and an amplifier, and not necessarily between the DAC and an integrated. While chasing down an issue with the Rowland, this connection came up for review and Jeff Rowland hisself did not endorse the DAC → HPB → Continuum connection.
I dropped off the Vandies the other day, and my room looks better for it, to be sure.
So, for any of the other subs that were recommended above, would I run line-out from the Continuum to the subs?