Nighthawk AC1900 Range Extender

[Windfalls]

Can I use my older Nighthawk Range Extender with my new Orbi Mesh Router and satellite?

[plemans]

Can you? sure, for the AC orbi's. You didn't put what model you have

should you? maybe

The nice thing about orbi is that the router controls the system. And most of the models are triband so they have higher speeds. 

the dual band extenders take a 50% speed hit just on how they have to operate.