Kr4 is right. The only thing I would add is that your BAT is fully balanced, why not just use it for everything? Its an outstanding preamp.
Is there a problem w/ using both amp inputs?
I would like to connect my Berkeley Alpha DAC directly to my Levinson ML336 via balanced input. And for other analog sources, connect my BAT VK51se pre to the ML336 via the single ended inputs. Would this create any problems with both inputs connected at the same time? Has anyone tried this?