I haven't heard either, but I have to think the DAC in the Lumin D1 is better. you could try the Node 2 for it's features and functionality spend the other 1500.00 on a DAC that may be better than the Lumin.
Blue sound Node 2 vs Lumin D1
I am looking for a streamer with a built in DAC. I have backed off my original plan to purchase the Aurender A10 and am looking for a less expensive option. The Bluesound and Lumin players do essentially the same thing BTW, my immediate interest is streaming Tidal, so MQA is a possible plus for both players. The obvious difference between $500 for the Node 2 and $2000 for the Lumin distinguishes the two players. Does that price difference translate to a significant difference in performance/sound quality? Both are within my budget but I would rather not spend the additional $1500 unless the improvement is fairly dramatic. I would really like to hear from anyone who has had both players in their system and have had an opportunity to compare them.