Check out these reviews of the Peachtree Nova 220SE using Magnepan 3.7's and 1.6's.
https://www.tonepublications.com/review/peachtree-nova220se-integrated-amplifier/
http://www.theabsolutesound.com/articles/peachtree-audio-nova-220se-integrated-amplifierdacheadphone...
https://www.tonepublications.com/review/peachtree-nova220se-integrated-amplifier/
http://www.theabsolutesound.com/articles/peachtree-audio-nova-220se-integrated-amplifierdacheadphone...