I need to test with my HD650. My initial thought is that the APM will edge it in soundstage and clarity.

Brilliant write up. I own an HD 800 (older non S version) connected to Modi Multibit/Magni 2 Uber. My AirPods Max just arrived yesterday. I have to say that so far you and I have very similar feelings. Crazy to think my $1800 setup is bested by my $550 APM in certain situations but here we are.

I have owned the Magni 2 Uber and Modi 2 Uber for about 4 days. They have been paired with an HD 650 and I can tell you they are absolutely fantastic. I previously had a FiiO E9+E17 combo and while the clarity was solid with that setup I never felt the support throughout the midrange. Also, the...

  My order has also shipped! I can't see my shipment on FedEx but I did 2 day so we'll see what it looks like when it updates.

I too ordered on 12/25 (Magni 2U and Modi 2U) and am waiting for shipment notification. Here's to hoping our orders ship out early this week!

Still waiting for my Modi 2 U and Magni 2 U to ship but I'm not going got hold my breath though as I ordered on Christmas Day. I would greatly appreciate impressions from you soon to be owners once you have yours in hand.

You need to use the line in on the E9.  You are sending the signal to the amp, not away from it.  You just need to use a 3.5mm male to male.   EDIT:   I think you figured it out.