Audioman 58 but we used to sell both the Cambridge and the Lumin. We had both units in the same system and could a/b both at the same time and in the same system, and there was no contest at all, the Lumin completely outclassed the Cambridge.
Also totally don't agree with you about beating $3k-$4k dacs, the Mytek Brooklyn Bridge is way better, so is the Lumin D2 and the Lumin T2 different league altogether.
The 851n is the same guts as the 851CD player a 2012 design.
Another fact Lumin is constantly adding features that people want, such as Obouz and MQA, we stopped selling Cambridge,because we coudn't sell the streamers as our clients wanted access to Tidal and were not interested in waiting for Cambridge to add Tidal access, both the CXN and the 851N streamers only had access to Spotify unless you wanted to blue tooth to the streamers. It took them years to finally add Tidal.
Don't think that Qbouz is available now is it, also no MQA.
The general hardware feature set of the Cambridge units are great, the sound quality is good, the no Qbouz and no MQA are kind of deal breakers for a popularly priced streamer.
Sorry to have a very different opinion of the company, they do make some excellent products, the 851N is showing its age it is a good piece for its no lower price with the above mentioned caveats.
Dave and Troy
Audio Doctor NJ Lumin, Mytek, dealers