[orthobiz]

...when they both have two tubes (four each if you count phono)?

A really simple answer, please, as I am not an electronics wiz.

Thanks!

Paul

[Tone Depth]

...when they both have two tubes (four each if you count phono)?

A really simple answer, please, as I am not an electronics wiz.

Thanks!

Paul

I'll take a try at this answer, although I'm sure there are others who could do a much better job:

The Transcendence 8 (T8) does the preamplification work with tube circuits.

The Ultra uses both tubes and transistors to each do part of the preamplification work, and is therefore a hybrid preamplifier.

[charmerci]

I'm sure someone is going to come on right after me and give a more detailed and better explanation... 
I'm not even sure if this is the entire explanation of why it's a hybrid.

Frank's hybrid uses the tubes only for the electrical voltage regulation, i.e. raising it.