Oh that's funny... there is a 30SS here on Agon just 6 months old... Gee am I NOT surprised.
On your DMA-180: keep in mind that the Spectral sound has changed significantly in recent years. Whereas your amp has this very wide but diffuse soundstage, the newer models, including the 250, have an extremely well focus but still wide soundstage. This was the sharpest contrast between the Alpha DAC and the old SDR-2000 I had, as well as the DMC-20 preamp's and the new 30SL's. Essentially, the newer designs offer this walk-around soundstage, and the reason you can "walk around" it is that you can actually feel the instruments due to the sharp focus - that's how palpable the presentation is.
On your DMA-180: keep in mind that the Spectral sound has changed significantly in recent years. Whereas your amp has this very wide but diffuse soundstage, the newer models, including the 250, have an extremely well focus but still wide soundstage. This was the sharpest contrast between the Alpha DAC and the old SDR-2000 I had, as well as the DMC-20 preamp's and the new 30SL's. Essentially, the newer designs offer this walk-around soundstage, and the reason you can "walk around" it is that you can actually feel the instruments due to the sharp focus - that's how palpable the presentation is.