dekay3,770 posts07-29-2021 9:10pmSuspect 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
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I aint buying in.
No evidence his hookups are faulty.