Well first the disclaimer - yours truly peddles deHavilland.
If the speaker is low efficiency and/or a somewhat difficult load and/or if you like it really loud, go with the GM70.
If none of those considerations come into the picture, go with the 845G. Now I have not heard them side-by-side in the same system, but my impression is that the 845 is a bit better sounding tube.
Duke
If the speaker is low efficiency and/or a somewhat difficult load and/or if you like it really loud, go with the GM70.
If none of those considerations come into the picture, go with the 845G. Now I have not heard them side-by-side in the same system, but my impression is that the 845 is a bit better sounding tube.
Duke