Pani, We're far apart if you admire old Marantz, Denon, Yamaha, McIntosh, Quad solid state electronics compared to recent vintage (last 10 years, for an example). There have been significant advances in transistor technology since the 70s and 80s, and those old circuits are needlessly complex as well (especially the Japanese stuff), with electrolytics and cheap switches in the signal path, here and there. Plus, we have much better parts these days, even if they're sometimes poorly applied. But that's OK. I'd look at the work of Nelson Pass as an example of advanced thinking.