  Recently, Aizenman and Warzel discovered a mechanism for the appearance of
absolutely continuous spectrum for random Schroedinger operators on the Bethe
lattice through rare resonances (resonant delocalization). We extend their
analysis to operators with matrix-valued random potentials drawn from ensembles
such as the Gaussian Orthogonal Ensemble. These operators can be viewed as
random operators on the Bethe strip, a graph (lattice) with loops.
