A detector with a modest sized magnetic field volume will, of necessity, have inert material (solenoid coil) in front of the calorimetry. It is therefore crucial to assess the impact of that material on the physics of interest. Since the thickness of material is of order a radiation length, Xo, and only a fraction of a nuclear interaction length, the physics topics concern the EM calorimetry. In this note, a Higgs boson with a wide variety of masses is used as a paradigm of SSC physics. Low mass Higgs bosons approximate the kinematics of inclusive Z production, while high mass Higgs bosons probe the extremes of phase space to be explored at the SSC. The scale of interest is the natural width of the Z, since backgrounds will increase should the resolution due to the inert material exceed this basic scale. 4 refs., 3 figs.