dannyd wrote:
Yes it's true that you can use Aggregate Device to stack Firepods.
But Firepods only let you use one of the 2 or 3 as master clock.
No external clock input.

Do you have something else in your system that requires an external
word clock? That would be the only reason why you'd need it. But shame
on Presonus for not including an input. Testimonials from famous
engineers aside, you really can't make a silk purse out of a sow's ear
by using an external word clock.