Thanks!
The left knob handles the input selector. You can see it on the rear corner. Tomorrow I get better photos.
It´s my first electrostatic amp and I can't compare but It ´s infinitely better than my SDR7 obviously. The bass is deep and powerful, without distortion or saturation, it's the most obvious difference. The sound is very nice, rich in details. I´m enjoying my Lambda Pro.
Sorry, I can´t dwell much. The English is not my native language
Now I´m thinking about a brother... a KGSSHV?