Topic: Using Loopback Main Output in "prefader" for Zoom

Is there a way to utilize Loopback on the Main output (AN 1/2), and not get nasty feedback from my studio monitors? I'm using headphones of course, but I'd like to be able to mute the Main (connected to my studio speakers) while still routing AN 1/2 through Loopback for my students to hear over Zoom.
Thanks for any help you can provide.