I bought my Bifrost 2 OG last October and in June I bought an Yggdrasil OG. The Yggdrasil OG has a very similar sound signature to the Bifrost 2 OG, The Yggdrasil OG has more refined detail and more refined sound stage. I listen to 50's, 60's, 70's and early 80's rock and roll, I also listen to...