6v6 preamp

[makinrose]

Since people here are unfamiliar with a "Suface" amp an explanation of exactly what it is might make your post more interesting. It would also be helpful to understand why you'd pick a power tube driven pre-amp over the hordes of various pre-amp tubes out and why you'd choose LED biasing over other methods. To try it? Some technical reason? Personal preference etc. Without context it's very hard to say anything about your post.