Juno D8 sounds different through headphones

Does anyone know why the new Juno series sounds clear and present through headphones but muffled and muted through speakers? I've sent it through QSC, Makie, Bose, etc but it still sounds like there's a blanket over all the patches. But through headphones it sounds normal and crystal clear.

And messing with the internal EQ on the keyboard doesn't help much. It just sounds muffled and just off.

I have 2 of them, after returning one when it just stopped working, outside of the pad/sequencer section. so it's not a unit issue, all three of them sounded the same. Muffled through external speakers and clear through headphones.