Suspect that they are not propely hooked up/connected.
If damaged it's unusual that both speakers would have the same fault.
Not a clue as to what the "add-ons" mentioned by the OP are, but suggest hooking them up stock (nasty jumper plate and all).
I responded to another Maggie owner here with similar complaints and the HF problem was resolved with proper hookup (poor electrical contact was the culprit I think, but too lazy to look back through my posts).
DeKay
If damaged it's unusual that both speakers would have the same fault.
Not a clue as to what the "add-ons" mentioned by the OP are, but suggest hooking them up stock (nasty jumper plate and all).
I responded to another Maggie owner here with similar complaints and the HF problem was resolved with proper hookup (poor electrical contact was the culprit I think, but too lazy to look back through my posts).
DeKay