A convertible instrument rack includes a frame and multiple yoke sets. The frame includes support members and the yoke sets each include at least three yoke members which are each placed on a respective one of the support members. The respective position of the support members can be selectively shifted on the frame and the yoke members can be selectively shifted along their respective support member to accommodate tubas or sousaphones, as well as tubas or sousaphones of different sizes.