Lew, the LOMC input stage of the VTPH-2 is FET-based rather than tube-based. Depending on the particular device and how the surrounding circuit is implemented, FET stages can have input impedances in the billions of ohms, and I believe in some cases even in the trillions of ohms, at least at frequencies that are relevant to audio.
I note that a poster earlier in the thread indicated that the "natural" input impedance of that input is 1 megohm. Even if the number is that low, however, it would not be unreasonable to consider it to be essentially infinite for all practical purposes.
Best regards,
-- Al
(A very happy recent purchaser of a VTPH-2. And as many others have said in this and other threads, what a pleasure Keith is to deal with!!!).
I note that a poster earlier in the thread indicated that the "natural" input impedance of that input is 1 megohm. Even if the number is that low, however, it would not be unreasonable to consider it to be essentially infinite for all practical purposes.
Best regards,
-- Al
(A very happy recent purchaser of a VTPH-2. And as many others have said in this and other threads, what a pleasure Keith is to deal with!!!).