[cpkorody]

Hi all -

I have a Sonic Euphoria passive pre which I like quite a bit. I am considering picking up a used Ultra and I am wondering if this will be a happy combination?

Thanks in advance for the benefit of your experience 

[TomW16]

The input impedence for a FetValve amp is 1 Mega Ohm according to Frank and, therefore, a passive preamp should work well assuming the source has adequate drive.

Cheers,
Tom