Ref 1 is a an all tube 6922 based preamp.
Ref 2 is still all 6922 but with 6550C regulator
Ref 2 II is a hybrid with JFet input and 6H30.
Chassis may look similar but they are completely different animals.
I concur with Sutt's opinion.
Ref 2 is still all 6922 but with 6550C regulator
Ref 2 II is a hybrid with JFet input and 6H30.
Chassis may look similar but they are completely different animals.
I concur with Sutt's opinion.