the speaker components are easy to remove. they did ship with an Allen key just for that purpose. Undo the bolts and gently lift the speaker out. you will easily see if one of the connectors is loose


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