Simulated magnetic DZ spectra for five different surface averaged field strengths (B_s), with each spectrum offset from one another by 1 in normalized flux. The inclination- and dipole-offset parameters are fixed to the values found for SDSS J1143+6615 (i.e. 15 deg and −0.15, respectively). The background Zeeman triplets have the same meaning as in Fig. 4, with the field strength scale given on the right-hand axis.