Can you get a stereo 2D sound to also play in the rear speakers?

Hi there
I’m trying to get a stereo 2D ambience to play through the rear speakers as well as the front.
I’ve imported the stereo wav, setup a cue, no attenuation, and then set it to a soundclass with a stereo bleed of 1.
I’ve tried playing it off an ambient sound actor in a test level and also triggered it via blueprints using the play sound 2D node.
The sound plays but only through the front L + R speakers, not the rear. Thanks!