I use a Schiit Magni 3 Plus for now. It has up to 12dB of gain so the DVD/Blu-ray player has about the right voltage going into the Freya S. I have the Freya’s volume control set at about 60% attenuated (13:00). With that setup I can adjust the volume of movie soundtracks using the Magni (sits right next to the couch) within it’s prime range of volume control. I may look into a more refined, but still simple preamp in the future but the Magni 3 Plus sounds pretty good as is. I’ll probably just keep using it. I don’t listen to my HT setup for the quality of music, for that I listen to other sources, but a good soundtrack off Blu-ray sounds just about as good as a hi-res file played through my streamer/DAC.
Tom