I wouldn't configure the tweeters as a dipole though, because to do that, they would need to be wired out of phase. The idea is to reduce side radiation by cancellation. A dipole radiation pattern forms two lobes, in front and in back. If the horns in an RS-7 were configured as dipoles, you would have no treble out in front of the speaker, only out to the sides in narrow lobes directly on-axis in front of each tweeter.

I'd wire the tweeters in phase, and attenuate them to match the midwoofer.