Cabinets will be shipped to us, but crossover assembly, final assembly & testing will all be done in the US.
There wont be any options for upgrades as we will already be using the best parts we can for the application, and there's not really any room inside the speaker for much else, the crossover takes up the entire bottom of the speaker.
That wont stop a customer from swapping out parts if they want to, but the space is quite tight.