ive been using my Anthem AVM60 pre-amp for more than 3 years and had zero issues with it. Well, some like every once in a while the HDMI gets mixed up, but I am not sure if that is a timing issue with the FireTV Cube or the AVM. to fix it, sometimes you need to power down the AVM and power it back up and its fine. Other times its the FireTV Cube that needs to be rebooted. But this is a once every 6-7 months type of thing. Anthem has said it's got to do with the sending remote control signals through HDMI timing thing. I live with it.

Anthem: AVM60, Fosi DAC-Q5
Axiom: ADA1500, LFR1100 Actiive, QS8, EP500, M3, M3comp, M5