  We study Efimov physics of three identical bosons with pairwise multichannel
interactions for Feshbach resonances of adjustable width. We find that the
two-body multichannel nature of the interaction can affect the universal
three-body spectrum, especially for resonances of intermediate width. The
shifts in this universal spectrum are caused by trimer states in the closed
interaction channels that couple to the universal Efimov states. However, in
the narrow resonance limit we find that the Efimov spectrum is set by the
resonance width parameter $r^*$ only independent of the interaction potential
considered. In the broad resonance limit all excited Efimov trimer energies
approach the ones from the corresponding single-channel system for the
scenarios investigated.
