Tube preamp for Pass Labs amp

Audiofeil, I'll bow to your experience, but the Pass amps appear to be less than ideal candidates for many tube pres, when one considers the the low input impedance and the preference for balanced inputs. Both of which would seem to disqualify many more tube than ss candidates. Perhaps you'd like to share more with us?

Unsound, almost any tube preamp manufacturer has to contend with transistor power amps that have a lower input impedance. Even the old Dyan Pas 3X was an example of that- the X designated that it was set up to work with amps with an input impedance of 10K ohms.

And of course these days there are tube preamps with balanced outputs too. The one we make has been in production longer than any other - and it has direct-coupled outputs so the 10K input impedance of transistor preamp is no worries at all.

Atmasphere, I know some pres have the the prerequisites, but it seems as though there are a lot more tube single ended pres with high output impedance's than ss ones. The Pass amps are particularly low input impedance, and the design seems to be particularly built around maximizing the use of balanced inputs.