I ended up calling Axiom and Deb was none the wiser on what to suggest. She has said that Andrew will be getting in contact with me. The speakers are still burting into noise, so I just have to leave them turned off all the time now when not in use and remember to turn the DSP back on as there is not any 12v switch for the unit.

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