So I’ve been using a JDS LABS atom amp with my emotiva power amp and it’s been sounding really good, you might want to consider something like that ie: headphone amp with pre outs. I was using my darkvoice tube amp with the emotiva and that Sounded good but the low end was not as clean as with the atom amp. I also was using an old Denon 2 channel with the emotiva hooked up to it and that sounded fine too. And it had plenty inputs with a phono pre built in. I wasn’t disappointed in any of them.