question about antenna installation

[lalojoshe]

I have 2 AP 2700E y just 4 antennas air-ant2535sdw-r.
what happen, if I install 2 external antennas instead 4 antennas?
How is the behavior of my AP?

[Haydn Andrews]

You will get degraded performance and potential wireless issues. The AP is designed for all 4 elements to be connected to work correctly

[patoberli]

That, plus you can actually fry the radio interface if no antenna is connected while it's running on high power.