Or use the SE. People talk as if the SE output on the Yggdrasil/Gungnir Multibit is gimped or something. It's not. I run the SE into the ZD, BA, Studio or whatever amp I happen to have at home for the moment. It takes a very very high quality ($$$) line-level transformer to sound better than the SE out; and even then, a transformer, no matter how good, will add distortion and phase shift at the extremes. FWIW, we are exploring the idea of a tube buffer for Yggdrasil/Gungnir Multibit. The problem is that there are many different approaches, some more expensive than others.