A) I was incorrectly plugging the Magni right into the headphone jack of the receiver (forgive me)
B) No built in phono preamp on the TT, so I go TT to phono jack on the back of the receiver, then run the Magni out of the Tape out jack. I'm not sure why exactly, but here are no RCA out for speakers, only the copper wire clips.
C) I ended up bypassing the receiver all together via a Rolls phono preamp, to the Magni, to Sennheisser 58x. I did this bc I was just on a must-isolate-components kick. Not sure of the benefits.
I have a Vali 2 on the way and thinking about the digital setup now. Thanks for all of the input!