On the DMA200(I also have two,too!), I have tried balanced
and unbalanced. Again I could not discern any difference
between the two types of connections. I use MIT MI350 Oracle
RCAs between the DMA200 and the DMC30sl preamp, use MIT MT770 UL RCAs between the DMA200 and the Avalon Radian speakers. I have talked with the service department at Spectral about using non MIT cables, they really frown on that idea. Networked cables really knock out the the high frequencies that could pass through(not a good thing).