I have used the cardas Golden croos and refrence PC. I was not impressed at all. very colored with poor imaging. wide soundstage; almost too wide ( ie, it felt exagerrated). When I used to own solid state gear, the cardas gear seemed to be a step up from the PCs provided by the manufacturers, but with my tube equipment which are far more revealing and trasparent, cardas clerarly is adding unwanted coloration. there are many better options out there