Tubes on top and Class D on the bottom

I am curious about an experiment involving tubes for the tweeter midrange and Class D Bel Canto M300s) on the woofers of my Von Schweikert VR-4JRs. After reading about the little Miniwatt N3, which is an integrated amp, can I use it for level matching? I would be feeding a signal from a Modwright SWL 9.0 tubes pre-amp to both amps. Or, would I blow everything up in the process, like Mister Wizard?