Thank you Deshapiro, your input is very welcome. Considering your findings on Switchman and Blowtorch and my own musical taste, I consider myself fully forewarned! Here are some further questions for you:
a. What is the input impedance of the Boulder 2060? Ref 3's outputs 600 Ohms which -- as I understand -- needs to be matched with amps with upwards of 20K Ohms input impedance. But the proof remains always only in the pudding!
b. Have you had the opportunity of auditioning/comparing any of the other linestages discussed here (VAC Ren II, VAC Phi, Aesthetix Callisto)? What were the sonic differences with Ref 3?
By the way, it looks like the upgrade to Ref 3 is not terribly extensive: just several tubes and the addition of bypass capacitors. Perhaps OneObGin can tell us how much ARC charges for the upgrade?
a. What is the input impedance of the Boulder 2060? Ref 3's outputs 600 Ohms which -- as I understand -- needs to be matched with amps with upwards of 20K Ohms input impedance. But the proof remains always only in the pudding!
b. Have you had the opportunity of auditioning/comparing any of the other linestages discussed here (VAC Ren II, VAC Phi, Aesthetix Callisto)? What were the sonic differences with Ref 3?
By the way, it looks like the upgrade to Ref 3 is not terribly extensive: just several tubes and the addition of bypass capacitors. Perhaps OneObGin can tell us how much ARC charges for the upgrade?

