Rubinson on multi-channel MQA
I put this here without endorsement. In particular I find the 2L recording really unbearable in most formats.
I happen to own the P7 and Mytek Brooklyn and listened to several 2L recordings in different formats.
The Mytek Brooklyn is wonderful and the Parasound Halo P7 almost it's equal in transparency. Almost, but not quite. http://www.stereophile.com/content/music-round-84-multichannel-mqa