Hi russ69,
Thanks for replying. A little more information. When I compare between tube and solid state using the main out RCA, (the only output that allows the automatic switching), I can hear zero sonic difference between the tube and solid state. Its almost as if no switching between preamps actually occurs.
I understand the difference isnt dramatic as this preamp is so quiet, but I expect to hear something. In contrast when I listen between the solid state and tube preamps by manually switching between the XLR inputs then I can hear a sonic difference. The tube has a broader deeper sound stage but less detail with percussion. Solid state is detailed, fast but with less soundstage.
I am using Audioquest Columbia interconnects both XLR and RCA. I am only comparing XLR settings against XLR and RCA vs RCA so dB difference doesnt factor. I am only comparing details.
Have you or has anyone had a similar experience with their C12000? Besides this issue its a wonderful preamp
Thanks!