Though I wanted to go tubes on my next amp, I was researching the Schiit Freya/Vidar combo. The Freya scared me off but I got to thinking about different tubed line preamps i could use instead. I had read that a pre’s output impedance must be greater than the input impedance of the power amp. How important is this? Are there more important factors? For argument’s sake I’ve been pondering building an ANkit L2 Line stage (no phono) into a Schiit Vidar. This would be for a mostly vinyl system through a Lounge LCR MK3 spinning reggae, punk and some hard rock with a tiny bit of jazz. My aim is a balanced sound that can deliver bass extension, handle faster paced music and deliver warmth and articulate detail. Thanks.