Roscoeiii - Thanks. And a little follow up...The improved sound allowed for a change in speaker placement.
For years my speakers were pretty much in the corners of the listening room; the speakers were 3.0 metres apart, and the front baffle was around 1.0 metres from the back wall - the room is open on one side, but the effective listening space is a 4.4 metre square. This corner location had worked well for my previous speakers (Wilson CUBS), but I had been hoping to place the Ushers closer together and further away from the rear wall, in the hope of adding depth to the sound stage. Previously, when I experimented with this set-up, the Ushers had sounded a little harsh, a little incoherent. Yes, there was a modest improvement in depth, yet the overall listening experience was less pleasant.
With the DAC2 DSD SE (and the new cables) I tried again. The centres of the drivers are now around 2.4 metres apart, and the baffles 1.2 metres from the rear wall. Voila! Depth aplenty, and no negative issues - smooth, coherent sound; imaging approaching the truly three-dimensional.
In terms of the relative scale mentioned previously - this is a +6. Not bad for a freebie.