Dave Davenport's line stage kits available through K&K Audio. Transformer coupled front and back with Lundahl amorphous core transformers; differential parafeed topology; very linear operation of the dual triode by using MOSFET CCS for plate loads. When coupled with the low reactance PS kit makes for a very quiet line stage that isolates all your sources from amps. No ground currents on your interconnects. That may not seem important until you hear the difference in your own system! This line stage improved the sound of my Cary SLI-80 integrated when connected in front of it. How could adding another device and set of interconnects "improve" something? I think "isolation" probably has something to do with this. It's too bad Dave and Kevin withdrew the Mood Indigo kit due to lack of interest. It had a nicely finished chassis and 5 relay switched inputs and two outputs, RCA and balanced. A newer kit version of the basic boards and parts are available if you want to "roll your own".
