The Valhalla 2 can be used as a single input preamp. I've used it with a Will Vincent/Dynaco ST-70. The V2 works great. Plenty of gain. no noise. Plus you can plug in your 'phones. Great piece of kit for not a lot of scratch.
Valhalla2 vs Freya+ as a preamp
I’m currently using the Valhalla 2 as a preamp in my big system.
I love it. Has anyone compared the Valhalla 2 to the Freya+
and is there a substantial sonic improvement? My goal is
holographic imaging and tube magic. If you’ve been in my shoes
feel free to provide input.