Thanks, I was looking at the Studiophono as well. I do like the mono toggle switch feature. I have a bunch of mono jazz albums that that would be fun to experiment with. From immediate research, one of the design features I didn't like about the MoFi preamp is there is no on/off switch. I honestly prefer to not have it on constantly. One of my Roku streaming boxes does that, and it heats up pretty good over time. I suppose I could run the MoFi preamp out of one of the power outlets on the back of my receiver, so they are tied together, but would need to look if the area could accommodate a wall wart.