I agree with Jaco here, this is definitely a v2 unit if it doesn't have IE42 but has IE16 instead.

BTW IE16 can do MHR but for 2-channel only. When I had an 861 v1 (upgraded to v2) and a 598DP, I could listen to 2-channel DVD-A at 24/96.

Cheers,
David.

Living room: DSP5000.3
WFH Office: M33
Bedroom: P200ZQ